Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b6c4c3a5ea7c1b0…

MALICIOUS

PDF

84.9 KB Created: 2020-11-21 04:50:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7c9678c85f91bdaf4e9f2940cb5c3214 SHA-1: 78aec1d78bbaeb2746eccff2dfc21736a1f009ea SHA-256: 7b6c4c3a5ea7c1b0f121152fdc06809b97e6899f9acd7e0a39af5391725f9e4d
254 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the presence of numerous links suggests an attempt to direct users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/123?utm_term=how+much+gunpowder+do+you+need+to+craft+tnt+in+minecraft In PDF document text
    • https://s3.amazonaws.com/sifawekujiki/honda_gx620_20_hp_v_twin_service_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369308/normal_5f9dc66c7d7dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425908/normal_5f9b822716aca.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/activepresenter_full_crack_32_bit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462341/normal_5fb3e72e7a746.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384634/normal_5f985a89eaca5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458413/normal_5fa62aae533aa.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/jsp_format_number_integer.pdfIn PDF document text
    • https://temevukovekolax.weebly.com/uploads/1/3/4/6/134688950/wuwuvoxibibetajato.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/fatanurodawubimepugarujeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385617/normal_5f8f918ee061f.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/ihk_bremen_berichtsheft.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417535/normal_5f9c7c4962efe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385213/normal_5f8fe5b9a9023.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
    • 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
🗂 Part of campaign: f-static.net 3 samples

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAF 5396 bytes
SHA-256: 1e292591bbd90dc42b9a9bc25542534319f79ddcc48327542a31612c2d3f4522
font_01_sfnt_off0000fcf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF7 10808 bytes
SHA-256: f5f727004bc8841d31b2280dd327b9a940faed86a8ed752f4414ad6e9676e06a
font_02_sfnt_off00012242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12242 16144 bytes
SHA-256: 2a5f1667c2e343500efde63e3dd6a136498333968b1680966ac5eb34589f1174
font_03_sfnt_off00013741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13741 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34