Malicious PDF — malware analysis report

Static analysis result for SHA-256 962c6e39c8028a4d…

MALICIOUS

PDF

75.1 KB Created: 2021-02-13 13:41:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 1f2d4fb4ab44817a06c79c2d5ac2b9c4 SHA-1: cc46cb39432369c2dc868c2531654f2bb46a2080 SHA-256: 962c6e39c8028a4df62e55d6fe68505642985a7ed02d5d73cd47bda169ee9898
186 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains a large number of external links, many pointing to disposable domains and hosted on services like weebly.com, suggesting a link farm or phishing campaign. The embedded document body, though heavily obfuscated, contains a URL that appears to be a lure for watching content online, which is a common phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/123?utm_term=watch+the+phantom+menace+online+free PDF link annotation
    • https://cdn.sqhk.co/wixexozesila/V4Us1gd/93342254621.pdfIn PDF document text
    • http://powerhdniy.space/analytical_job_interview_questions_and_answerszf8ue.pdfIn PDF document text
    • https://badosajag.weebly.com/uploads/1/3/1/4/131407507/mobulikerarape.pdfIn PDF document text
    • http://hayatevesigar.online/68608145828u4qbk.pdfIn PDF document text
    • https://cdn.sqhk.co/damapegapi/mXy0Rgf/14844768484.pdfIn PDF document text
    • http://magnitoli-2ekran.site/encadrer__la_dizaine_prs_ce2sgoie.pdfIn PDF document text
    • https://nupafosudivoz.weebly.com/uploads/1/3/2/6/132682156/2817151.pdfIn PDF document text
    • https://gopelema.weebly.com/uploads/1/3/4/3/134314553/lujinavupa-kosagiz.pdfIn PDF document text
    • https://pikupazu.weebly.com/uploads/1/3/4/5/134577858/9521723.pdfIn PDF document text
    • http://electorat.org/ice_cream_recipes_chocolate_chip_mintq5pe7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474978/normal_5fd119e26072f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469126/normal_5fe11be73e5ea.pdfIn PDF document text
    • https://lefesime.weebly.com/uploads/1/3/4/8/134882546/woluwesinatimo-sujud-mivodixijiju-xotunamivag.pdfIn PDF document text
    • https://cdn.sqhk.co/wewutivuv/3Aeiihj/bingo_song_cocomelon_youtube.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456685/normal_5fdbaaf71674e.pdfIn PDF document text
    • http://prizinsta365.site/eenadu_epaper_today_telugu_downloadyq1w0.pdfIn PDF document text
    • https://muvuvudu.weebly.com/uploads/1/3/5/3/135351086/1d4f526.pdfIn PDF document text
    • https://xidazujagavoza.weebly.com/uploads/1/3/1/4/131453269/7525379.pdfIn PDF document text
    • https://norofuzalugegok.weebly.com/uploads/1/3/4/8/134882219/sutidi_datesoso_diwovapo.pdfIn PDF document text
    • https://zopiwaseka.weebly.com/uploads/1/3/0/9/130969839/1919923.pdfIn PDF document text
    • https://fefujosiniw.weebly.com/uploads/1/3/4/8/134862858/205697.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE919 5092 bytes
SHA-256: a1e7bbcdd68e1c750f799f1d5d88730d59a6d5e536f7c139ee1825d04c86c56e
font_01_sfnt_off0000fa51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA51 10656 bytes
SHA-256: 2c4240106a9e919a73ca1e7003d2a72e4acff48bf8310193e8b715d49dfc5bd1