Malicious PDF — malware analysis report

Static analysis result for SHA-256 beebfa299df1e955…

MALICIOUS

PDF

68.1 KB Created: 2021-02-22 06:01:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d18f79194c4802fcddd13569f5cfae57 SHA-1: 7a3ee358c5894f04a709c9077a9215a1570fab07 SHA-256: beebfa299df1e95553cd2c742d5def310441904f467092e7e0ee6644e31b9359
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, forming a link farm designed to direct users to malicious websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://druttle.ru/wix?keyword=don%2527t+eat+the+teacher+book PDF link annotation
    • https://fuwefepitebu.weebly.com/uploads/1/3/4/7/134709748/820453.pdfIn PDF document text
    • https://zuxovupogoxa.weebly.com/uploads/1/3/5/3/135386903/2727793.pdfIn PDF document text
    • https://zororoxuz.weebly.com/uploads/1/3/4/3/134309160/zuxasanatakos_tatikedotiwopo_xenojekopupiz_goridelotubuw.pdfIn PDF document text
    • https://xifexovajebim.weebly.com/uploads/1/3/0/7/130740184/bemawuporisigaxene.pdfIn PDF document text
    • https://fulimutalez.weebly.com/uploads/1/3/4/5/134599943/siraludanibobarewa.pdfIn PDF document text
    • https://vevorusafe.weebly.com/uploads/1/3/4/5/134516648/zopotelosi_joralewox.pdfIn PDF document text
    • https://laregupofonel.weebly.com/uploads/1/3/4/4/134464195/a697de9eb2aa57.pdfIn PDF document text
    • https://cdn.sqhk.co/kojetovukufo/majeVTL/20141751893.pdfIn PDF document text
    • https://kozowesojufeg.weebly.com/uploads/1/3/4/7/134717080/2842547.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://wemosoxa.rf.gd/champ_bengali_song_mr_jatt.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/ketir.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/demonstrative_pronoun_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/44676956087.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/cissp_cbk_5th_edition.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_off0000c577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC577 4656 bytes
SHA-256: 04452b40c657b4953580480a0537717ce7c19b38791de77c09e0204cb640ec5a
font_01_sfnt_off0000d53d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD53D 9424 bytes
SHA-256: 58e577942c07352937b8f27a4e1fba9ff252a58f1c75398edf13a59b60391cf6
font_02_sfnt_off0000f567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF567 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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