Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e86840432c8a216…

MALICIOUS

PDF

90.9 KB Created: 2021-04-02 04:43:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 83a93a06e9db98bbc80063ba73dbca8a SHA-1: b1b26be4599c90e07a44acfd8ecb1bc7660199f9 SHA-256: 2e86840432c8a21691930e8979d1411ffabc11e15281ff05761138c2f79b0d5f
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://golowaki.ru/aws?utm_term=ny+dmv+driver%2527s+license+practice+test PDF link annotation
    • http://epaytds.xyz/jaluxukeladuwutu3094.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/5hiRjdv/break_it_down_song_tiktok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408720/normal_5fe3214ab8e9b.pdfIn PDF document text
    • https://cdn.sqhk.co/xusokivaxame/jbWjgjb/rupekuxazigawiwemenol.pdfIn PDF document text
    • https://bajewenizuku.weebly.com/uploads/1/3/4/4/134475359/katadojar_babiremo_tobexujir_doxak.pdfIn PDF document text
    • https://felabare.weebly.com/uploads/1/3/0/7/130776415/pidaleroselu.pdfIn PDF document text
    • https://kapadarobuziwel.weebly.com/uploads/1/3/2/6/132696145/2429904.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463298/normal_6050f5bf57801.pdfIn PDF document text
    • http://netzamka.ru/222923250420qh5t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368962/normal_6002df6064bb5.pdfIn PDF document text
    • http://stnold.com/graysmith_robert_zodiacqsq24.pdfIn PDF document text
    • http://mmuuue.space/dagewimx9q1.pdfIn PDF document text
    • http://vinnipoh.fun/vuwarakofaxodekanenamepepdzo.pdfIn PDF document text
    • https://cdn.sqhk.co/saboxiwago/vjd0hj0/duck_donuts_marlton_nj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500670/normal_5fc758b5a1dbc.pdfIn PDF document text
    • https://govewusig.weebly.com/uploads/1/3/0/9/130969429/bifolodafafipelumim.pdfIn PDF document text
    • http://se-mrush.com/bodybuilding_workout_manualc6gge.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1fae3a98-13b7-4b95-b1f0-1fbd1b7b0aee.filesusr.com/ugd/1da05d_e3b4348d4a834927974ca655eedb1274.pdf?index=trueIn PDF document text
    • https://443275ec-395d-4f86-84c9-2ed7a250e117.filesusr.com/ugd/7d471d_f9acd3e98c9c4f3fabc435f2e4639038.pdf?index=trueIn PDF document text
    • https://2a497570-3881-454f-aefc-229a18bbdf22.filesusr.com/ugd/83e24f_0f84254d5cb44abcbfac84bf427b7160.pdf?index=trueIn PDF document text
    • https://50bf384a-eeac-4f26-a262-e2ba1a5e00ba.filesusr.com/ugd/17159d_02c4c53a14194fad9bf031d9210d9963.pdf?index=trueIn PDF document text
    • https://edb7bb8d-792a-4213-93ec-7f573d37cc74.filesusr.com/ugd/bfd504_6b4ec22b85024f028ec1cb8bdb9d278c.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001226c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1226C 5384 bytes
SHA-256: 201fd6859a45ad1f24007f7a64e3fd133597f6eafe993609ef27868ed7299c8e
font_01_sfnt_off000134bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134BC 12248 bytes
SHA-256: 978addc389cb0a6418aaea7b3fb1c06a48ec7378ed50f3a36edb75d380891d06

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