Malicious PDF — malware analysis report

Static analysis result for SHA-256 2057356ed07bbe19…

MALICIOUS

PDF

82.5 KB Created: 2021-03-18 21:41:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 33f9627f1779e267c1270b3292c8dd2a SHA-1: 2b6e1b10044120d5da9020ca7b3f4f89ff9bb660 SHA-256: 2057356ed07bbe19708ee2e66fddf22fc9c2d3a854b186da0cbaf0db5f5a8ec8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample was classified as malicious by ML and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, with a notable one pointing to 'baarspo.ru', suggesting it functions as a link farm or redirection service. The PDF's structure and embedded URLs are consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://baarspo.ru/wix?keyword=target+macro+ffxiv PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379851/normal_5fd296fbecd2f.pdfIn PDF document text
    • https://gagividezi.weebly.com/uploads/1/3/4/4/134477411/5733385.pdfIn PDF document text
    • https://nedetuvozuwe.weebly.com/uploads/1/3/4/6/134699612/nijore.pdfIn PDF document text
    • http://kogegoleteneka.iblogger.org/62204355880.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483075/normal_5fdf7201499e0.pdfIn PDF document text
    • http://rukafijawidataw.iblogger.org/83382347591.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424013/normal_60291d5f6a72a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491159/normal_5fd702d85237e.pdfIn PDF document text
    • http://tadinos.22web.org/does_the_v_shred_program_work.pdfIn PDF document text
    • https://bibatajikoxego.weebly.com/uploads/1/3/5/3/135315017/4107444.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449615/normal_5feb88b5da8c8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jofosomorigifo.rf.gd/vibowodisuw.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/mupug.pdfIn PDF document text
    • http://kezijewuzal.epizy.com/37834535218.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/golaxo.pdfIn PDF document text
    • http://koburolamugalo.rf.gd/42198795625.pdfIn PDF document text
    • http://baruluzibovog.epizy.com/beep_sound_ringtone.pdfIn PDF document text
    • http://jiwunix.epizy.com/download_matlab_mac_free_full_version.pdfIn PDF document text
    • http://godavuvexo.epizy.com/dunixegowog.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/mofatogiwomovapoduba.pdfIn PDF document text
    • http://dorofudi.epizy.com/9386046554.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC96 3172 bytes
SHA-256: 8530b0ac5f00ff318e3428d24141a6ff5b4e38f076a699d4812dc583916eea0a
font_01_sfnt_off0000f7f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F4 4748 bytes
SHA-256: a4876bf1a0bb4d313c862e72a74903389a960661f8a6f6b0a81b9ad70d78f9aa
font_02_sfnt_off00010822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10822 11080 bytes
SHA-256: c4a5b0ffbfeaef7ba767732669ed201f11a5cdb04fc389dd1981ec468acd7237
font_03_sfnt_off00012dd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD6 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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