Malicious PDF — malware analysis report

Static analysis result for SHA-256 aba091337fa48619…

MALICIOUS

PDF

73.7 KB Created: 2021-02-19 01:20:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 844bb5463d22606ecbe1486428894c4f SHA-1: 9f946842003bbea99776de62fbaa5d97e47ffccb SHA-256: aba091337fa48619a131b10ba93dc9a9a4828036ac378fa5cdccfbda01402132
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a malicious redirector. The heuristic firings indicate the PDF is designed to link to a large number of external resources, likely for SEO manipulation or to host malicious content. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

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
  • 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.
  • 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://yafferge.ru/strik?utm_term=what+is+the+writing+culture+movement In PDF document text
    • https://cdn-cms.f-static.net/uploads/4476446/normal_60242362d4e76.pdfIn PDF document text
    • https://kitejunozog.weebly.com/uploads/1/3/4/3/134319277/551184.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465255/normal_602eb26de8e99.pdfIn PDF document text
    • https://davijonixumitu.weebly.com/uploads/1/3/5/3/135349017/duxexizapemamibu.pdfIn PDF document text
    • http://lady-bug.club/13212963262d1ibg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490269/normal_5fe7d029cb045.pdfIn PDF document text
    • http://businesslinecenter.com/dragon_s_crown_vita_trophy_guide7wlp9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425726/normal_6022995c81105.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371020/normal_5fe3eb14267e6.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/xupizewuxere/avery_label_printing_template_8160.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/makita_chainsaw_chain_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/mituzuleruw.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/fipikipesupukoresowikege.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_off0000e456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE456 5380 bytes
SHA-256: 62f403c6c76768e979a7f59b01a4a85dc9f98da7f1b90670ce7e529771838cd6
font_01_sfnt_off0000f692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF692 10216 bytes
SHA-256: 35b34cc061ff73ca0372b03392a40d63841eb448eff42715c37233eb7da27e31

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