Malicious PDF — malware analysis report

Static analysis result for SHA-256 0563ed02d6dfe354…

MALICIOUS

PDF

91.4 KB Created: 2021-04-21 06:42:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 11cb88aa5a4c9101d36b1bd13258aef6 SHA-1: 20113389659b4f1813682673827de5423c0408a0 SHA-256: 0563ed02d6dfe3544a539a7f71981172387b331a6f28b8a1019faca2dcc6630b
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of external links, many of which are on disposable hosting and utilize UTM parameters, indicating a link farm designed for SEO manipulation or phishing. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to phishing sites or download further malware. No scripts were extracted, but the document's structure and URL patterns are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gimoguvi.ru/strik?utm_term=polygroup+summer+waves+pool+pump+stopped+working PDF link annotation
    • https://rinotawobuv.weebly.com/uploads/1/3/4/7/134768279/xavizasizu-mefumurinobu.pdfIn PDF document text
    • http://detonicinitalia.website/1514854536826vsz.pdfIn PDF document text
    • https://xarupome.weebly.com/uploads/1/3/4/4/134469096/6197414.pdfIn PDF document text
    • http://thepropheticapp.com/sizulijijemosaip.pdfIn PDF document text
    • https://begafirezudafo.weebly.com/uploads/1/3/1/4/131438667/jubazagejodefis_mifoxutunujotop_duzube.pdfIn PDF document text
    • https://tamusibexo.weebly.com/uploads/1/3/5/9/135966636/6687213.pdfIn PDF document text
    • https://gejixivipoza.weebly.com/uploads/1/3/0/9/130969358/piwotova-gasotofoxu-maxegelulumar.pdfIn PDF document text
    • http://amsidgi.xyz/answers_for_relationship_statust5qdy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://9afb1793-bc57-4514-bb46-74e980466609.filesusr.com/ugd/11f207_293b484edbd14cec9f2dc0ac0f7b69fc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/58774144-b3fe-4693-bf55-1eac2d3fec17/wavozekuzamar.pdfIn PDF document text
    • https://6d8b2927-5c4d-40df-b593-c6bd35e19528.filesusr.com/ugd/1adac8_1ded1a8b9cd14633aaabc494601403cb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fd128ed-a474-42a3-ac4d-7f30bcc5560c/tajevopov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec3b668c-3b57-4e89-bf98-a8e462e349fd/cdma_workshop_2.7_cracked_free_download.pdfIn PDF document text
    • https://ba30dffa-51fe-4caa-9472-6f142403a9bb.filesusr.com/ugd/c2007e_4cf0f512323e42c592c0b2bd0f4ec757.pdf?index=trueIn PDF document text
    • https://0fe83ef2-ed6b-4f04-a52d-31fe3c58d8d1.filesusr.com/ugd/ade4e6_5e008495d4c34254aa4430de46b7cb28.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0e613bf-6144-4688-aa66-6dddd8091ea5/42918362150.pdfIn PDF document text
    • https://1e438cd7-6f3b-42ac-a97b-d13a75fa135b.filesusr.com/ugd/0c268c_78ccb262538d4fef8c78e26aabc688c2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/68e0a155-05f5-49fe-a90c-0083259ce99a/pewaperulora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b5a3c46-b06c-4f01-8344-bf0ef1ee957e/perdona_si_te_llamo_amor_2008_actores.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91a29694-33e2-49c1-bf49-5c223a134c4b/denon_avr-1712_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c5938a3-ac5c-4a94-9068-2dbc6ec8733f/what_does_seeing_808_mean.pdfIn PDF document text
    • https://fa53e508-d88d-41cb-897c-7a5b6f1bfcc3.filesusr.com/ugd/361045_2fb6e2b505d04cfa9f1193cead441c55.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/226336fb-90d0-4d80-b0fa-ec0fac337575/netgear_cmd31t_speed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52238af3-7c80-48d0-96b6-00a94c027e74/pathfinder_antipaladin_optimization.pdfIn PDF document text
    • https://91506351-5699-48ce-85e7-8e7d071f4e87.filesusr.com/ugd/d775a9_591e66566743412290008296232a8695.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://uploads.strikinglycdn.com/files/522In macro / runtime command snippet
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011a06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A06 5480 bytes
SHA-256: 38d0b8050fc3b9ee299161e93f2647d986f3f7681e83c467e0f30e55f5154672
font_01_sfnt_off00012cad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CAD 10792 bytes
SHA-256: e39136b079d8ce404726210d4dbc37b887c9ab841288dea4d94f89400bd600dd
font_02_sfnt_off00015160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15160 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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