Malicious PDF — malware analysis report

Static analysis result for SHA-256 01136b1eb0dbe69f…

MALICIOUS

PDF

76.9 KB Created: 2021-04-06 05:21:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b9c5e429fd9d7fd5d4d72369ac849632 SHA-1: 4308f10ef05d2960484f4121ada940f63ef04e4c SHA-256: 01136b1eb0dbe69f451f43e1935cb01eaf4ab3eca06044f32dfff474c481753c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or SEO spam. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL `https://fokemale.ru/strik?utm_term=why+do+i+get+little+water+bubbles+on+my+fingers` suggests a lure to a potentially malicious site, likely part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://fokemale.ru/strik?utm_term=why+do+i+get+little+water+bubbles+on+my+fingers PDF link annotation
    • http://madewithsunshine.com/4447102135mm4bt.pdfIn PDF document text
    • https://cdn.sqhk.co/jopubelo/ggVgcfL/warubudiguzoresudogowo.pdfIn PDF document text
    • http://linza.media/dutasoviwesowukajulexodey81ot.pdfIn PDF document text
    • http://goxuvux.22web.org/8713901452.pdfIn PDF document text
    • https://cdn.sqhk.co/jobolekul/gggcmic/color_palette_quiz.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/zuponefi/68373618989.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/95554136998.pdfIn PDF document text
    • https://4a5660cc-52a2-48ff-9acb-4b4f1704cb6e.filesusr.com/ugd/81868d_8b108ee17ee945d6907fbd4e88cecd9d.pdf?index=trueIn PDF document text
    • http://zesirares.epizy.com/house_rental_agreement_format.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/there_is_no_easter_bunny_meme_template.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/xugatofajejekejelul.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/how_do_i_replace_my_delta_faucet_parts.pdfIn PDF document text
    • http://lurorozowuwa.rf.gd/eureka_nen110a_whirlwind_bagless_canister_vacuum_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/garojasofugodovu.pdfIn PDF document text
    • https://e53c8fcc-339b-4d8f-83f6-44ddc8c6ace4.filesusr.com/ugd/1ea9c4_37ecc55bda1249ff909cb214aa8589bc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/getizar/vozavuxagobuxobu.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_off0000ed8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8B 5668 bytes
SHA-256: 444ea805fa6d4e111348c9d76105f6c1c14a6d31ffaa2cc6deb0795bf5ba3023
font_01_sfnt_off000100ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CA 11292 bytes
SHA-256: 32e4b6086a67d7bd97337697c1ca225afb7982ef161d22dc26fd7ba3b5ca2ad3

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