Malicious PDF — malware analysis report

Static analysis result for SHA-256 6802385c3c4fdbe2…

MALICIOUS

PDF

80.9 KB Created: 2021-01-11 12:59:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ff1dea7a64eea864725dc9a6a12b18a1 SHA-1: ef802803763959d6de5c372e0586fd59d4684de1 SHA-256: 6802385c3c4fdbe2bedb6216d60038997b91ff52d05eda29f3e527911a979fe2
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a link farm, with one pointing to a known malicious redirector. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/aws?utm_term=bleacher+report+nfl+picks+week+9+2019 In PDF document text
    • https://site-1166598.mozfiles.com/files/1166598/118591190.pdfIn PDF document text
    • https://cdn.sqhk.co/pojuwudedi/4j0kQhg/rizizewosegi.pdfIn PDF document text
    • https://cdn.sqhk.co/takejirasomu/EhhePib/my_cloud_personal_cloud_storage_2tb.pdfIn PDF document text
    • https://cdn.sqhk.co/keliziniw/cLjaNvp/91648738374.pdfIn PDF document text
    • https://xawawamofolapus.weebly.com/uploads/1/3/1/4/131436997/vovitexo.pdfIn PDF document text
    • https://cdn.sqhk.co/rilixuzewiv/Dsvdvje/ben_10_alien_swarm_villains_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/kelopifagisu/jhGidL3/pekuwiditasulerodulum.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/singer_classic_44s_bobbin_size.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/governance_committee_template.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/lawidewu.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/animated_emoji_android_app.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/15465575373.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/milatezisorumoneduvebef.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_off0000ff94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF94 5792 bytes
SHA-256: fe8231e61131e66dc3f01a063a4cbc8a6c6ed3b4357f810e218175785b731744
font_01_sfnt_off00011360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11360 10544 bytes
SHA-256: 65173dc9e83879a910d5a8812c445085be9ae0f194c8bee8050793aa92d3aadb

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