Malicious PDF — malware analysis report

Static analysis result for SHA-256 9445639e61780ac9…

MALICIOUS

PDF

84.9 KB Created: 2021-01-11 12:49:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 738e70186b7b1e3f3cebca7c43a78e50 SHA-1: e019fcae7f377f4942bf344b3d8b48ba9c997f9a SHA-256: 9445639e61780ac9e3cb67ac2937569d2947488590b9d1b33ddbafef181fe8ba
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of embedded URLs, many of which are associated with redirector infrastructure and link farms, indicating a likely phishing or malware distribution campaign. ClamAV detection and ML classification further support its malicious nature. No scripts were extracted, but the extensive use of malicious links suggests the document's primary purpose is to redirect users to harmful 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
  • 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://gettraff.ru/aws?utm_term=organic+flannel+sheets+target In PDF document text
    • https://cdn.sqhk.co/xiroxozalal/jdJghb9/gitaxiralatixurarik.pdfIn PDF document text
    • https://cdn.sqhk.co/ferudati/alggegg/black_friday_deals_2019_walmart_airpods.pdfIn PDF document text
    • https://resowijex.weebly.com/uploads/1/3/4/6/134681832/jarexin_vapovesezeze_lekugonozut_dubemobanun.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxokakijefe/Pgg8lYY/rurasonojaromizinefotumi.pdfIn PDF document text
    • https://site-1178522.mozfiles.com/files/1178522/kiwojasag.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489994/normal_5fc45bc43c669.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455876/normal_5ff392cd0cc6b.pdfIn PDF document text
    • https://cdn.sqhk.co/rewazexi/MieLbjd/19915978774.pdfIn PDF document text
    • https://cdn.sqhk.co/fogobewataja/ekhezrD/11319244893.pdfIn PDF document text
    • https://varijiligedag.weebly.com/uploads/1/3/1/3/131383591/nokuvuwerisin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378151/normal_5faa879e86eca.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/zafirawit/aadhar_mobile_number_update_form_online.pdfIn PDF document text
    • https://s3.amazonaws.com/nepawigexa/74087145846.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/72719967534.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/hallelujah_guitar_tab_fingerstyle.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/pinorabejume.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2B 5172 bytes
SHA-256: 0f01e020de80095c65ce94f2c3a5c04384b8d1a9c56ae1dd2769770b1fb77fe4
font_01_sfnt_off00011ec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC0 12916 bytes
SHA-256: f18f889848b22969381639b2c5de786a49dff021be881237f9262e93b00d1661

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