Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3005c9604442801…

MALICIOUS

PDF

66.6 KB Created: 2020-11-10 01:11:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 44dcd1685e032a365f338f5a1a4aa207 SHA-1: de7b92cb133953c71d888305f21688f38a6d49ca SHA-256: e3005c9604442801e5f6460018cb377a9a8d91d79d3d16ae1052dba5f0f8fbe1
156 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 0.9998

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 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://trafficel.ru/123?keyword=otis+app+review PDF link annotation
    • https://sarerudaguf.weebly.com/uploads/1/3/4/3/134373173/jifanuvifab.pdfIn PDF document text
    • https://xabizukilitexe.weebly.com/uploads/1/3/4/3/134335342/fujujuseto.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/3590787.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485010/normal_5fa770dca1846.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/09b03b.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/gupuso/lemutudinenizumufipuzes.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/53062023431.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/libavazumimazijolivas.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/introduction_to_biomass_energy_conversion.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/15290886674.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/hulu_live_tv_channels_list_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/66745371868.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/464195f6-f680-4923-9bf3-0dd3bcbfe489/sizedenuradujivepamutipaj.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/zedurutabuvop.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/25958221752.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98d7affe-705d-4bb5-9054-1455a1bd9490/wegimesimewuzupapijajaw.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_off0000c8b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B2 4960 bytes
SHA-256: 913fb90a552f26b2b73a6aa6326cd998ad930af56428ca0a0bb3de844bfd47f0
font_01_sfnt_off0000d9b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B6 10772 bytes
SHA-256: 731041592a3509acbd65b3323bb9446ab709fa5a975ebee207858a851222ddaa

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