Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3618e94aa7d7150…

MALICIOUS

PDF

65.1 KB Created: 2021-02-14 21:49:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 41ea322634970174f8fda4cc12c9c91e SHA-1: 7c1507340295146db0428abbc3c1bdb820e5df4d SHA-256: d3618e94aa7d71503f53fda7b219c120a11353904e80a8fcc1427f10051bf762
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://yafferge.ru/wix?keyword=jogo+slenderman+winter+edition In PDF document text
    • https://static.s123-cdn-static.com/uploads/4447437/normal_6001490633878.pdfIn PDF document text
    • https://xufevojulan.weebly.com/uploads/1/3/1/3/131384667/ziguxoba.pdfIn PDF document text
    • http://labincom-med.ru/65312346087jvtw5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418567/normal_600450641f8f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465402/normal_5fce06999af39.pdfIn PDF document text
    • https://wupugosow.weebly.com/uploads/1/3/1/3/131382590/porod_janibebid_rilew.pdfIn PDF document text
    • http://ru-1.casa/riselosakavupo8osmq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407318/normal_5ffa0741e0682.pdfIn PDF document text
    • http://istra-backwater.ru/mipavaxaxovedowasidojufuykyft.pdfIn PDF document text
    • http://trokot-new.online/12688712213yluhf.pdfIn PDF document text
    • http://circulshtangcalip.website/puloxorezofrujjv.pdfIn PDF document text
    • http://alfa-quest.ru/cosmic_meaning_in_bengali_movie7xdiy.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/besafefaf/72049542886.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/cloudformation_template_add_lambda_trigger.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/5113625681.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/aeriforme_e_gas.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_off0000c38f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC38F 5228 bytes
SHA-256: fb86055f3c72157dac5d536c774ddbe1e4ccd426082a1a74f4511073c903a39e
font_01_sfnt_off0000d546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD546 10044 bytes
SHA-256: 1eb663ab0e6b12e2715f8f80ca0a134dbb34abc39b6db65f132ed30833d8eb1b

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