Malicious PDF — malware analysis report

Static analysis result for SHA-256 0549fb3911b718b3…

MALICIOUS

PDF

73.5 KB Created: 2020-11-24 19:22:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 91a6b2efcaeebebd8f95a6e9884579e4 SHA-1: eb57125aa696cbb4c014d8fc7d1aa36add0e59d3 SHA-256: 0549fb3911b718b3b45c0c1465b275dda962f3c8805fb4ae33a39b5aedd213dd
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a redirector link farm and a phishing trojan. It contains numerous embedded URLs, with at least one pointing to known malicious infrastructure. The document's primary function appears to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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/strik?utm_term=vizio+d24h-g9+specs In PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/f5d445.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368979/normal_5fadace239f3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368468/normal_5f8a8b25da175.pdfIn PDF document text
    • https://welarozukakiwa.weebly.com/uploads/1/3/4/4/134497755/9979211.pdfIn PDF document text
    • https://zafigitelerom.weebly.com/uploads/1/3/4/3/134338481/saxiviw.pdfIn PDF document text
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/lizel.pdfIn PDF document text
    • https://gadigode.weebly.com/uploads/1/3/2/6/132680949/7b43908c0f21e.pdfIn PDF document text
    • https://kenilajapa.weebly.com/uploads/1/3/1/0/131069910/zunejiwenuja.pdfIn PDF document text
    • https://sipimivib.weebly.com/uploads/1/3/4/6/134657766/7601450.pdfIn PDF document text
    • https://nimaxinamupun.weebly.com/uploads/1/3/4/6/134635612/48bfb.pdfIn PDF document text
    • https://mojenosude.weebly.com/uploads/1/3/1/3/131382274/7229121.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/lebejos/water_cycle_information_in_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/finance_tracking_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/nanuwuzeg.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_off0000e196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE196 5420 bytes
SHA-256: eeb528ac4d75e476b6ae914f7046cc4f1ed477826edce5cc12550d4e7a5b8dfd
font_01_sfnt_off0000f425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF425 10804 bytes
SHA-256: 56726093fe44a29c387a74485fc70e4aeb53f45985f8d78b488e22942ff00ba1

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