Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6dd26fb5cb2b23c…

MALICIOUS

PDF

75.8 KB Created: 2021-03-28 06:15:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 601bcd65be08b0c9a9073cae0c9de943 SHA-1: b2f9c36e13dcaf27e41e8ff9a27b017e8ab31a59 SHA-256: f6dd26fb5cb2b23c4a4263f6c529ee90f40f75462c17e65ccbcad2c6218e7e02
186 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, containing numerous external links to various domains, many of which are hosted on disposable or suspicious platforms. The presence of a URL with a "utm_term" parameter suggesting a search query for "ccleaner windows 10 gratis italiano" indicates a potential phishing or SEO spam lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/123?utm_term=ccleaner+windows+10+gratis+italiano PDF link annotation
    • https://sobemifukoku.weebly.com/uploads/1/3/4/8/134887972/noxal.pdfIn PDF document text
    • http://dakolozen.22web.org/face_sheet_mask_book_cena.pdfIn PDF document text
    • http://xugafigipi.22web.org/android_car_bluetooth_keeps_disconnecting.pdfIn PDF document text
    • https://kovipokuvukos.weebly.com/uploads/1/3/4/4/134497495/liwituzosasavasoromo.pdfIn PDF document text
    • http://sezuxol.22web.org/tebiragovorowomasexorusal.pdfIn PDF document text
    • http://podarokinsta24.online/buduzogesokarjsaq.pdfIn PDF document text
    • http://huaweistoreukr.xyz/pretty_little_liars_tv_series_age_ratingtpfab.pdfIn PDF document text
    • http://sibuvre.com/mavigamegoxawowidowowusap4od7.pdfIn PDF document text
    • http://world-wildshop.com/344426065163fpxh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ce8421a-9688-435b-bd76-cc36433a9b23/realidades_3_workbook.pdfIn PDF document text
    • https://171e2b11-24ea-4535-acac-f971ec821c4b.filesusr.com/ugd/a07927_4f4a12363ae142b4a8f6711c411f200a.pdf?index=trueIn PDF document text
    • http://gazosaka.epizy.com/98497899257.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/the_curated_closet_amazon.pdfIn PDF document text
    • https://2c549fd3-bbcc-4e43-aea5-84609313cfd4.filesusr.com/ugd/c162b3_e0046dbd59364fd48eedc8a03ecee0d8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/97a0f3fe-c0ca-479a-a3fe-4911c1d4ab9c/covid_health_and_safety_guidelines_bc.pdfIn PDF document text
    • http://wavazazefeka.epizy.com/54543379181.pdfIn PDF document text
    • https://d4cba69e-f3c5-4a64-9e40-69ba24924691.filesusr.com/ugd/b73feb_d5a392587bc14dc38b9b02496d11b08a.pdf?index=trueIn PDF document text
    • https://b23183eb-b2e5-455e-bc25-91fac1efd10f.filesusr.com/ugd/cc14e4_567a626eebb249f58bf34e3b9de21f23.pdf?index=trueIn PDF document text
    • https://5a2ada08-5b6c-402a-b0df-3636415b461e.filesusr.com/ugd/434ae6_c42ce21075a341e58def3768e8effc3a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/muwitof.pdfIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB53 5296 bytes
SHA-256: e1e4a7083876aa8fe3e592015d435b477d57b57e5b047b0e9781453b27aa829e
font_01_sfnt_off0000fd77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD77 11236 bytes
SHA-256: 30a252fbe96674d8ffbc105060f008e100f04dfe63fadb2ca78f37f9f188b0cb