Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd2e49aebc680819…

MALICIOUS

PDF

71.5 KB Created: 2021-04-25 12:35:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: de7bdd38569530fd4758712a5a980e0b SHA-1: 817b22eee247410d18016c25ebf6fa52ad69efab SHA-256: bd2e49aebc68081960c4a55b188d9de4ef09b4179afea26b7832e7af4c3eeaa1
186 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains a large number of external links, many pointing to disposable domains or link farms, suggesting a phishing or SEO manipulation scheme. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://nipisod.ru/strik?utm_term=1978+honda+xr75+price PDF link annotation
    • https://xaleratugigajij.weebly.com/uploads/1/3/4/6/134631249/kelukujuvazax-rogudozedifuno-sadulebuzake-porudenefalalat.pdfIn PDF document text
    • http://italywow.space/tagonotwrm.pdfIn PDF document text
    • https://gilivederediwo.weebly.com/uploads/1/3/4/6/134683856/jolizizojuf_moguxe_nevonubaxow_dafefatomodero.pdfIn PDF document text
    • http://copyrightshelpscenters.com/disneyland_map_california_adventure_2019tb5ct.pdfIn PDF document text
    • http://mif-smeh.space/zotululujorotorepopiw7nsbd.pdfIn PDF document text
    • http://bopalinowojege.iblogger.org/mathematics_project_download.pdfIn PDF document text
    • https://jiwumakot.weebly.com/uploads/1/3/4/2/134235931/18cc5bbe142.pdfIn PDF document text
    • https://tumunonapuve.weebly.com/uploads/1/3/1/3/131379134/palexula.pdfIn PDF document text
    • http://doordash.fun/giwabipibanubimagamijon06wy4.pdfIn PDF document text
    • http://feldhaus-klinker-plitka.ru/49182330340nmf2.pdfIn PDF document text
    • http://tricitysikhs.com/sirowipuw6cfz.pdfIn PDF document text
    • http://gbo.guru/7688518258b0xxb.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://93dbb2ad-f1e8-4c6c-adfd-2ef134399473.filesusr.com/ugd/df4650_1eb7713eed144fd7ae58a0de9060c2cc.pdf?index=trueIn PDF document text
    • http://zujejuxuj.rf.gd/11596305552.pdfIn PDF document text
    • https://aefbb2f1-1cfc-4a48-aab2-d72547d84173.filesusr.com/ugd/2f3ac6_5bd68493990e41fbbe5e567bfc0af8b7.pdf?index=trueIn PDF document text
    • https://e24ff460-1725-4b9d-a7de-f8438c38fea0.filesusr.com/ugd/366850_eefee45ad58a429e9305d74c4ff8b95a.pdf?index=trueIn PDF document text
    • https://9c50f6df-e9c1-453e-a208-eff1cefe231f.filesusr.com/ugd/44b3dc_6c61e3d56d924e08935037bf100794d1.pdf?index=trueIn PDF document text
    • https://d56a38bf-d62e-453c-9b5b-5b2fe88aea46.filesusr.com/ugd/359e64_7868923d93fb49bca48049d2aea995e7.pdf?index=trueIn PDF document text
    • https://676a7a22-5bec-432e-92e0-9d4a0a27851c.filesusr.com/ugd/a1fb72_0c709aa956544495a9e3cd4391694378.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6F 5240 bytes
SHA-256: b2d79860b82a8b4874eaf8aeefa044b5ade821093b59edac8abd3f54c679b50e
font_01_sfnt_off0000df2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2F 10444 bytes
SHA-256: 22cba219bb11f9743e6c347851202c9afa2db02f0e3985b001b3bb0199147da2
font_02_sfnt_off000102e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E0 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333