Malicious PDF — malware analysis report

Static analysis result for SHA-256 7747680c3ef3a35b…

MALICIOUS

PDF

81.0 KB Created: 2021-03-24 00:47:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f9c0984a700ac6653a3dbdba114fc6e3 SHA-1: dfd3115ee9c7264ffa9345efc7c4f83c378f4bda SHA-256: 7747680c3ef3a35bc4726073821d5f6d56ce6ad23ac68e2f3429306728365db0
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of an SEO link farm designed to redirect users. One prominent link, disguised as a 'Garmin 541s user manual', leads to a redirector URL. This suggests a phishing or malware distribution attempt, leveraging social engineering to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://xajibur.ru/strik?utm_term=garmin+541s+user+manual PDF link annotation
    • http://fakaripeti.xyz/24737523648d0rdn.pdfIn PDF document text
    • https://cdn.sqhk.co/fegadosijete/pshjeaz/6704535440.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379221/normal_604c9bf81f8db.pdfIn PDF document text
    • https://cdn.sqhk.co/vinogusi/wjjibMa/zuwevijikuxepev.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422134/normal_5fee86d5f1ef3.pdfIn PDF document text
    • http://ru-1.casa/bezudimalasuza1stub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485318/normal_5ff14d2137ee2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379046/normal_6058f9b3a0600.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/egdidgi/11426410298.pdfIn PDF document text
    • http://scotiaenlineape-personas.com/dunkirk_xeb_4_boiler_partspw9j2.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/fasudikek/australian_catholic_super_rollover_form.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/sinister_circle_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/pufivomixolotonofofemomeb.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/10679664439.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/42342241835.pdfIn PDF document text
    • https://f0eb70e7-a818-4ef6-a4f0-9c477642c899.filesusr.com/ugd/bca722_071f3d87f80e40628896e7b623ee783e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/dopowiligufinis.pdfIn PDF document text
    • https://49550882-97ce-44db-a38b-6e383bb81149.filesusr.com/ugd/062c90_c9872dbcbb0d44d6814ddc3c2428869a.pdf?index=trueIn PDF document text
    • https://2080fafa-2491-4ac3-8118-a138f33bff34.filesusr.com/ugd/822ecd_c60414641914432c830311f627d2ab37.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/suzexanitexepidud.pdfIn PDF document text
    • https://s3.amazonaws.com/laginekux/tipos_de_apresentao_fetal.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/beats_by_dre_wireless_headphones_studio_3.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_off0000fe6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6F 5128 bytes
SHA-256: 572cc42e6d08476d531629139d85778daba07e9723cec1d1e6fbfcb39c1089e5
font_01_sfnt_off00010fd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD9 11672 bytes
SHA-256: e0bba78f16e467d30a37d49e7f426a80dfd89f2cd373999721f4779f2b3d3276