Malicious PDF — malware analysis report

Static analysis result for SHA-256 d86aea1ba485e0fc…

MALICIOUS

PDF

70.2 KB Created: 2021-01-24 14:41:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 73d295f5d70024cf19e050048ca2f44f SHA-1: 764dad6e0d62c120221de77083367818c711b229 SHA-256: d86aea1ba485e0fc25e17af23e06227ae11c8e5946a3804c06d5b64285935a8a
256 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://rimixobavi.weebly.com/uploads/1/3/3/9/133987070/1d3a940.pdf.
  • 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://seumenha.ru/123?utm_term=how+to+become+a+food+critic+without+a+degree PDF link annotation
    • https://rimixobavi.weebly.com/uploads/1/3/3/9/133987070/1d3a940.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422133/normal_5fe97eb35bacd.pdfIn PDF document text
    • https://fofirajajamide.weebly.com/uploads/1/3/4/6/134643930/7492297.pdfIn PDF document text
    • https://venonaneguwar.weebly.com/uploads/1/3/5/3/135398509/xoperuraw_kamovikorowoj.pdfIn PDF document text
    • http://outputqwvk.space/96448664333x3bbn.pdfIn PDF document text
    • https://nagipunewemog.weebly.com/uploads/1/3/5/3/135315215/mapesozokuninij.pdfIn PDF document text
    • http://pinegrvuig.fun/parefuvemilinonevadux53m0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448743/normal_5feafb7037f01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410004/normal_5fdb5b92d0d62.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/zedilegol/cause_and_effect_matrix.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/64580466233.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/free_weight_watchers_apps_for_android.pdfIn PDF document text
    • http://rupeguv.epizy.com/game_design_merit_badge_pamphlet.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/19948656325.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/ansible_template_file_variable.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_off0000d3e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E6 5420 bytes
SHA-256: a122531ae8a9c39454fc1e1e467bdff6b7aae15b6f2921d2da7861e9bf611e4d
font_01_sfnt_off0000e63a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63A 11008 bytes
SHA-256: 48ca6fec0970abbd4fa87af8cbb1d39851da8abbf6bc8ac04d1ca5367b827a63

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