Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b7696446b54e2a0…

MALICIOUS

PDF

73.3 KB Created: 2021-02-04 07:51:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 1951eb65753c013d397026c102a4d9d9 SHA-1: a9290bbaf30b0cecdd447dc31373de76f5b89bdb SHA-256: 8b7696446b54e2a0454c9aad41670f96d0289c1c773ddcf8ad2a849f13ba99e1
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/wb?keyword=sembaruthi%20sembaruthi%20song%20%20mp4 PDF link annotation
    • https://cdn.sqhk.co/dijogiper/LpjcKhi/13672356858.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459469/normal_5fd9162b74840.pdfIn PDF document text
    • https://cdn.sqhk.co/tekuligote/nhje0g6/earth_signs_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/nezazexador/ggjebll/93382866791.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485435/normal_601a010f165c0.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/W0jbbhe/sec_football_2020_coronavirus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379371/normal_601147f1e55c5.pdfIn PDF document text
    • http://torevifij.iblogger.org/febrile_neutropenia_guidelines_idsa_2017.pdfIn PDF document text
    • https://fometixivoros.weebly.com/uploads/1/3/1/6/131637143/kidibupugapojax_zaxokebofapig.pdfIn PDF document text
    • https://cdn.sqhk.co/kurotevu/e2hhTxd/joxunotemopukesi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380674/normal_5fcaaadba0ada.pdfIn PDF document text
    • https://xikewewojan.weebly.com/uploads/1/3/4/0/134095915/67602.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373517/normal_5fe2da4d87d5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501503/normal_5fdac1a092913.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443814/normal_5ff87ea748cf2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e0b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B9 5532 bytes
SHA-256: 9af278537f4aad4b69d258d5475103f4a9704a472133be6afbfe405209ea260f
font_01_sfnt_off0000f35a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35A 10824 bytes
SHA-256: a2402af911e0764cfb9d1ec2a70e85a7a1389da650019709cc666970c5a933e6