Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cebbcaeca4bde6a…

MALICIOUS

PDF

85.9 KB Created: 2021-05-27 19:52:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 155c774cee5add06565673554c7a8d81 SHA-1: 7086891d3b3a63f0b82e93c7289dc0ce5777d775 SHA-256: 9cebbcaeca4bde6ae919ee9c3ab892a3a56e6c63754d87e6d816f8e1a62d6752
206 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to other PDFs hosted on disposable domains, suggesting a link farm or SEO spam operation. The presence of a callback lure heuristic also suggests potential phishing or scamming activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://zajinet.ru/strik?utm_term=what+are+exchange+transactions PDF link annotation
    • https://senuwisaf.weebly.com/uploads/1/3/4/0/134018119/3de1b40d0fd0bc.pdfIn PDF document text
    • https://rejigebejone.weebly.com/uploads/1/3/4/4/134462336/bedas.pdfIn PDF document text
    • https://lififotepul.weebly.com/uploads/1/3/4/3/134339298/jiruxokelifavuxova.pdfIn PDF document text
    • https://fedubipogumuwu.weebly.com/uploads/1/3/1/3/131379546/fulefe.pdfIn PDF document text
    • https://rewodudifizaba.weebly.com/uploads/1/3/4/4/134475466/dogetosa-tirojizozazure-jeseje-laxufu.pdfIn PDF document text
    • https://dajifavetesa.weebly.com/uploads/1/3/4/2/134234726/navoxejukegul.pdfIn PDF document text
    • https://zedodunojoponex.weebly.com/uploads/1/3/6/0/136083391/2661573.pdfIn PDF document text
    • https://vixugusimuxomuj.weebly.com/uploads/1/3/0/9/130969476/d019dbf1fde5.pdfIn PDF document text
    • https://retarabad.weebly.com/uploads/1/3/3/9/133997928/1607321.pdfIn PDF document text
    • https://karubidodofibe.weebly.com/uploads/1/3/4/3/134316277/fezakijuwoxaneg-jonavewakeme-sewonekebet.pdfIn PDF document text
    • https://gunubamevozapub.weebly.com/uploads/1/3/3/9/133997290/retivegikefa.pdfIn PDF document text
    • https://lolaxazexujobiw.weebly.com/uploads/1/3/4/7/134762367/4b55eea45856c5.pdfIn PDF document text
    • https://xowunaxevome.weebly.com/uploads/1/3/4/6/134679103/mazotezapufejuti.pdfIn PDF document text
    • https://linusakeziri.weebly.com/uploads/1/3/4/7/134747074/xeximufezakemoxa.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/2a5eeb7a-311c-4394-8b44-9936ae1fc827/puzoposiroradonemodarabo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23c785ff-6e69-4ed0-8657-0c208344ec60/31179837878.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd6a483c-31c1-4140-bd80-2f108930e3fa/84975994905.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c7b5731-eae7-4151-a3a0-4893ab647566/provenance_emulator_ios_12.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_off000110ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110AC 5108 bytes
SHA-256: bfe0903faeb25ad9da89040cbdb02a3c08d35bc05999f0c25752d40225f21048
font_01_sfnt_off0001221b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1221B 12200 bytes
SHA-256: 530737b3fbd1318333fff8225a7b92a15598c4e4cb4f25a725aedd45f7f4bad1