Malicious PDF — malware analysis report

Static analysis result for SHA-256 699a478c9a4c7b7e…

MALICIOUS

PDF

80.4 KB Created: 2021-04-26 00:23:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c9d16794e261691d4069a4747d93e216 SHA-1: c6d86d7957e3103b72a7f3375d5be7a70ccf0632 SHA-256: 699a478c9a4c7b7eb6fd3563593b6694684ed326019aa70bb631dcda3a8fb950
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to what appear to be SEO-optimized PDF hosting sites, a common tactic for distributing malicious content. The heuristic PDF_SEO_LINK_FARM and PDF_SEO_UTM_REDIRECTOR_LINK indicate a link farm strategy, with one prominent URL being https://resalured.ru/strik?utm_term=datamax+i+4208+driver. ClamAV and ML classifiers also flagged this PDF as malicious, supporting the phishing and potential malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/strik?utm_term=datamax+i+4208+driver PDF link annotation
    • https://jagozuru.weebly.com/uploads/1/3/4/3/134360529/97d5af1a.pdfIn PDF document text
    • https://mexakogu.weebly.com/uploads/1/3/5/9/135981712/musisalafuli.pdfIn PDF document text
    • http://zitosobuzozuz.22web.org/dopuxulamoref.pdfIn PDF document text
    • http://bitjoms.xyz/gexuwevowekimipn1kth.pdfIn PDF document text
    • http://nebokamuwego.iblogger.org/acalasia_cirugia.pdfIn PDF document text
    • http://ecoterritory.store/cub_scout_emblem_clip_artbuh52.pdfIn PDF document text
    • http://wide-mean.top/74616465169754k7.pdfIn PDF document text
    • http://socialwave.me/494006096503aclf.pdfIn PDF document text
    • https://tunoworuv.weebly.com/uploads/1/3/4/0/134017870/valovimenutik-monobe-guxuloz.pdfIn PDF document text
    • http://xobukafa.iblogger.org/improvises_in_jazz_crossword_answer.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/pozokimepe/24091781495.pdfIn PDF document text
    • http://xolisijepe.rf.gd/what_is_digital_humanities_scholarship.pdfIn PDF document text
    • http://kimanafidigij.epizy.com/how_to_ask_her_dad_permission_for_her_hand_in_marriage.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/3845759734.pdfIn PDF document text
    • http://miloxagiwe.epizy.com/seamless_pipe_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/70295806960.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/consulta_anticorrupcin_preguntas.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/joparokenuxefedofevo.pdfIn PDF document text
    • http://fosarasopu.rf.gd/why_is_my_printer_leaking_black.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/dudupedojeb.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_off0000ecc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC3 5444 bytes
SHA-256: f8b632f317ed503a54a0a04fa3d704f6ad2ddf567ff3c3d6f8ba391f9de1e831
font_01_sfnt_off0000ff47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF47 23868 bytes
SHA-256: 76e01859906b57975f5ea8bf29f10d62cfb5d9eeb912863429abe06268cf047b

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