Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d6935ea12aea70a…

MALICIOUS

PDF

71.6 KB Created: 2021-06-11 02:58:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 8f532efcb54537caea05db76d696aeab SHA-1: 3db716202a6c7c61d169149283681fd66f0060ed SHA-256: 7d6935ea12aea70a9431872021d716f7303a9a653154a47a7c2dfd0748b5b598
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one pointing to a suspicious URL related to 'unfollowers assistant apk'. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting an attempt to drive traffic to potentially malicious sites. ClamAV also detected this as a 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the PDF structure and external links strongly suggest a phishing or malware distribution attempt.

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://coretry.ru/pbw?utm_term=unfollowers+assistant+apk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4488580/normal_5fc6b2e3515c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417327/normal_601bbb2a05d81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453129/normal_606641bb54337.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369782/normal_5fdde27ae2b63.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475863/normal_5fcc54df17203.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367680/normal_6005b6621c9d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471250/normal_5fe7915992eda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453579/normal_5fc62f9a730ce.pdfIn PDF document text
    • https://nofitipofawotuj.weebly.com/uploads/1/3/4/0/134012335/tujuxexurapazevani.pdfIn PDF document text
    • https://wuzafonufiza.weebly.com/uploads/1/3/4/3/134341979/xugavadarer-gorenunavi-dijipixiru.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495050/normal_60059a56d032d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451205/normal_6026948cb0c72.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebc0319a-a44b-43f5-9754-50747aeee4c9/kitchenaid_stand_mixer_color_change.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/276c297e-706d-4429-aca8-35062f5a6dd9/what_does_a_banquet_houseman_do.pdfIn PDF document text
    • http://gulisapil.pbworks.com/f/xurexosuwe.pdfIn PDF document text
    • http://lexibitite.pbworks.com/f/20794819110.pdfIn PDF document text
    • http://tugovozow.pbworks.com/f/skyrim_enchanting_potion_ingredients.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1a7575d-0c71-4a3a-80a1-38f4b0fdbdd9/79836997663.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/482e0058-82d5-4094-9be8-218ea0445950/2003_ford_focus_zx3_svt_hatchback_2d.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_off0000db7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7C 5044 bytes
SHA-256: ca6c13b72509d4c717e813eebc54e607039ca000c2d557b7f1b44766e88f4096
font_01_sfnt_off0000eccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCF 10780 bytes
SHA-256: 6822ca9cf9354c0f4db622f3a6a19a0a690efd7057d1c86eacf4d2b0f6338e45

Open this report in the interactive analyzer, or submit your own file for analysis.