Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe0c1725b1d8bb31…

MALICIOUS

PDF

76.6 KB Created: 2021-05-26 04:11:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 3bb9ccfc915b906b44bfdbe2153aa02b SHA-1: 91e403baa0e9c14cc636eda4bbab3600d51bab43 SHA-256: fe0c1725b1d8bb31d986dee74e164f97118dfafbc65ad54a57f092f1c8cb3fe9
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 heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The primary external URL, https://botokaw.ru/strik?utm_term=worship+song+blessed+be+your+name+lyrics, suggests a potential phishing or malware distribution lure. ClamAV detection and ML classification further support its malicious nature, indicating it is likely a phishing or trojan distribution document.

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://botokaw.ru/strik?utm_term=worship+song+blessed+be+your+name+lyrics PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415527/normal_6009f800d3cc4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411218/normal_600316e0eae97.pdfIn PDF document text
    • https://sekojufakov.weebly.com/uploads/1/3/0/7/130776719/buvomubeziv_zivawomifakoted_xolojugujek.pdfIn PDF document text
    • https://boxenujevodaziw.weebly.com/uploads/1/3/1/0/131070305/420728.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378379/normal_5fcb6bacb9d68.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479938/normal_5fc75e13b73c5.pdfIn PDF document text
    • https://gifuroromila.weebly.com/uploads/1/3/4/3/134377961/92daacddee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463791/normal_60074648a3902.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505687/normal_5fcfafd4aeb1c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370525/normal_5fed98e16631e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456122/normal_60115638a9903.pdfIn PDF document text
    • https://rogenogenitel.weebly.com/uploads/1/3/4/3/134316557/gopapezivudoge_pilejuvilo.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/e4144f2f-5c63-4a1d-9e65-43b474b5d56b/fitbit_charge_hr_2_leather_band_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40022fe2-75a6-4434-bccb-c7aab0f94e5f/zarup.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/phn_mm_ct_ghp_file_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/661e48e4-6873-449a-999e-7622c04fd161/jekotofuxaw.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/the_mask_of_the_red_death_theme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abbb0fbe-58c7-4cc3-b355-3a3408bd2dc0/54510516511.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13286d39-c213-4e03-826e-ec5587ce5cfe/nefokasetakawakise.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_off0000ec96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC96 5744 bytes
SHA-256: bcbb48f97f2c52be87f8f51a5a741c299dcf0a2c2dd0331f9cf7698b32989e2b
font_01_sfnt_off0001000a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000A 10856 bytes
SHA-256: 4d1342027fb1511727afd984c2f4b3ee3a5b6df176ea671ee4637fd001707ce4

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