Malicious PDF — malware analysis report

Static analysis result for SHA-256 891b56f3a54e48a2…

MALICIOUS

PDF

63.0 KB Created: 2021-01-13 23:12:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: eaeb0f7ade03b5f9240685311a285121 SHA-1: c1acf1e246aea3ac7f11a3f23c8d8971a2cc63d4 SHA-256: 891b56f3a54e48a2571a9d3207926e71cc77a7487e99592c111c0eb223c788eb
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious or deceptive content.

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://trafffi.ru/123?utm_term=vw+baja+bug+for+sale PDF link annotation
    • https://cdn.sqhk.co/migazajigum/ujxgihi/63701427671.pdfIn PDF document text
    • https://xenofoko.weebly.com/uploads/1/3/4/7/134735933/490500.pdfIn PDF document text
    • https://suvibumaluri.weebly.com/uploads/1/3/4/4/134458401/5522003.pdfIn PDF document text
    • https://merejeweja.weebly.com/uploads/1/3/1/3/131381112/799124c01.pdfIn PDF document text
    • https://zexenokupilifuw.weebly.com/uploads/1/3/4/3/134375928/72754001.pdfIn PDF document text
    • https://monubigikupo.weebly.com/uploads/1/3/4/4/134493781/fobumexobinanel.pdfIn PDF document text
    • https://rofofomigedug.weebly.com/uploads/1/3/4/4/134486696/gadoluxo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jolozidabi/ganex.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/guided_meditation_for_depression_and_loneliness.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/48286075110.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/human_circulatory_system_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/understanding_business_nickels.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/juwipaw.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/wanitivu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE98 4856 bytes
SHA-256: 61a4294a2783af6e72a64f5efa5f458eb643b2a0e72e87dfb5d1575ab561ae38
font_01_sfnt_off0000bf49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF49 9908 bytes
SHA-256: 1e69cc5b35a8efad41e5b46c8a425ee6ec74c2b713dfa4c76315f8db89791b0c
font_02_sfnt_off0000e13b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13B 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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