Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3ed32b5f7300267…

MALICIOUS

PDF

77.9 KB Created: 2021-06-09 02:53:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c067d0007dec58e2be83ec5dde9da00d SHA-1: aa52c8cb7f2096740b5b11c51729b99b7b233e71 SHA-256: a3ed32b5f7300267be740aee6a721a3fd6ac52360ac189f6d10307aa14a9b22b
186 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many pointing to disposable hosting services, and is flagged as a link farm. The document body, though heavily obfuscated, contains references to 'Avee player hack version', suggesting a lure. The presence of multiple external links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://huntic.ru/pbw?utm_term=avee+player+hack+version PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4448718/normal_6003994c975ad.pdfIn PDF document text
    • https://vebupanulaxufe.weebly.com/uploads/1/3/4/3/134393715/lizuduxagobapu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374373/normal_5fd1d16f5ca5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495254/normal_6037f56a6bff0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469860/normal_5fd17a96845f9.pdfIn PDF document text
    • https://larunigilusevim.weebly.com/uploads/1/3/5/3/135320243/f87150.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446497/normal_5ff13a5d6f70a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467915/normal_605f7921153b3.pdfIn PDF document text
    • https://pamarilu.weebly.com/uploads/1/3/4/3/134322341/pixupefowabosulo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420604/normal_60163dca5d445.pdfIn PDF document text
    • https://voberugupov.weebly.com/uploads/1/3/4/4/134496708/kegebusa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477864/normal_5fd046d9155f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475208/normal_5fdc72790da35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461485/normal_604ca9ec91d7f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382948/normal_5ff0494c3e3d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369506/normal_5fe6c91b26a3d.pdfIn PDF document text
    • https://vixugusimuxomuj.weebly.com/uploads/1/3/0/9/130969476/ab4d0fa6dedf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426810/normal_5fed8ff194783.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447251/normal_601bac78b7f1c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489609/normal_5ff755ee9a5ed.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/bbe7937f-a3dd-435c-bc9a-4b87898f1508/41782612298.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25bae5c0-c4bd-4db7-93ba-f555039271b1/arabic_grammar_book_in_bangla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9691c3b9-0a76-4395-a09c-2873bdaa7796/the_notebook_characters_zodiac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ba885cc-ba4f-4353-a49b-a5951831cbca/polk_audio_psw505_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d661557-cf8d-40a9-a769-c9ac4991c0ca/the_selection_series_book_2_read_online.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_off0000f0fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FA 5236 bytes
SHA-256: 430a863c826c5f3420dd352f51c2bab092b8aa4e1a2570b3c664ea64fad6d8cf
font_01_sfnt_off000102cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CD 12192 bytes
SHA-256: df2189b5924f438473fe54239f8e9ded69dac85391ade05e736b1f1680894886