Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe22c4c250ba20dd…

MALICIOUS

PDF

77.7 KB Created: 2021-03-02 01:31:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e6a61fc141db41db4ee25ba6919491ef SHA-1: 3825579dd022a9ab8a55b2c8b7010f25982b8b50 SHA-256: fe22c4c250ba20dd17b042547744384233d8a63c20a3a4132c5b5e91e0bb7fd9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

Heuristics 5

  • 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 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/strik?utm_term=what+type+of+battery+does+a+garage+door+opener+use PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367646/normal_600bb9723f9ac.pdfIn PDF document text
    • http://rejemezurufoveg.mywebcommunity.org/37423687732.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449776/normal_5fe2e1f5bc752.pdfIn PDF document text
    • http://wunadimizurened.medianewsonline.com/when_was_the_kitchenaid_mixer_made.pdfIn PDF document text
    • http://wumewil.sportsontheweb.net/tinefiniratupanumanomelew.pdfIn PDF document text
    • http://xenalebosob.scienceontheweb.net/9605104141.pdfIn PDF document text
    • http://kefijor.mygamesonline.org/xuweroresobomorifizera.pdfIn PDF document text
    • http://sitizinudex.getenjoyment.net/bemuzanijizojagulilat.pdfIn PDF document text
    • https://wodanosivowifig.weebly.com/uploads/1/3/4/5/134593279/13c71bba6dce467.pdfIn PDF document text
    • https://cdn.sqhk.co/juvanejejuwo/hK3giNS/slap_kings_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bifiwapaz.onlinewebshop.net/plate_tectonics_crossword_puzzle_answer_key_1-26.pdfIn PDF document text
    • http://zatuvejamubolo.atwebpages.com/luwozevakejef.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE332 2900 bytes
SHA-256: a28fcc4ba65d8171a55e8b87d646ac5d1dd213f66ab2b0026fd39e5ca5d32d1a
font_01_sfnt_off0000ed74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED74 5528 bytes
SHA-256: ab8acb976c25697a21e4aacb1b40eae4ec4fa6d7b02528919de97306befb3473
font_02_sfnt_off0001004b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004B 12968 bytes
SHA-256: acd6706477248cc8856ae9524909ed53578a868af960c92b77d977b628919a99

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