Malicious PDF — malware analysis report

Static analysis result for SHA-256 1af1ad4374a6cc73…

MALICIOUS

PDF

70.5 KB Created: 2021-01-25 18:57:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 8c7337e77fcbff62282573e3393ab638 SHA-1: 3c75659fb2a2a2bc1a9b44bce79cfba57dc1a95f SHA-256: 1af1ad4374a6cc73b04b721e4008d4affcfa162d6640ca15068026d4cf100339
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wb?keyword=eso%20crystal%20blast%20changes In PDF document text
    • http://naturwow.space/toy_carnival_frenzybone_quest_ragnarok_mobilewmq3l.pdfIn PDF document text
    • https://lokeduvedip.weebly.com/uploads/1/3/4/8/134885922/646979a4551.pdfIn PDF document text
    • http://www-sfr-fr-monespace.com/fill_line_colour_3d_printing6payf.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/badolonoje.pdfIn PDF document text
    • https://xinofebew.weebly.com/uploads/1/3/5/3/135305957/0141cbe8bfa.pdfIn PDF document text
    • https://tagakokiginozol.weebly.com/uploads/1/3/0/7/130775172/9552298.pdfIn PDF document text
    • http://trickyturkey.com/pifaneg7fejj.pdfIn PDF document text
    • http://alphabitx.com/matudibowematodaxurewe594ck.pdfIn PDF document text
    • http://klyshsheff.xyz/69154413201lif6m.pdfIn PDF document text
    • http://serviceforyou.site/fikobalebuxevonag91io8.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/donukadizolin/double_negatives_worksheet_1_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/analytical_skills_test_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/property_market_analysis_report_sample.pdfIn PDF document text
    • http://jixuwir.rf.gd/bloons_td_6_apk_free_3._0.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/epsxe_emulator_for_android_apkpure.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_off0000d521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD521 5260 bytes
SHA-256: 31cb859410a58ded1ffc443ff994c4022d33eecc723908f067f0c41e2a018fc2
font_01_sfnt_off0000e705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE705 11120 bytes
SHA-256: 0729453f23de975e32520a1ec104177177e24f4af9ce4cd66b5a58d64e5320f4