Malicious PDF — malware analysis report

Static analysis result for SHA-256 b01b4d19043002f5…

MALICIOUS

PDF

102.4 KB Created: 2021-03-28 17:26:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 465cb88e794d13262f5380eb9c65a167 SHA-1: 082ed235d870e5537b88d434f14ab8c3dd4002db SHA-256: b01b4d19043002f5a1846b1ad464a2f6921e75a70b80661b5ef162eec9db27c0
254 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains embedded links that redirect to a malicious domain, likely as part of a phishing campaign to lure users into downloading further malicious content. The presence of a link farm suggests an attempt to distribute malware or phish for credentials. The ML classifier and ClamAV detection strongly indicate malicious intent.

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
  • 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://dafemum.ru/wix?keyword=centurylink+tv+guide+gulf+shores+al In PDF document text
    • https://gufagopa.weebly.com/uploads/1/3/4/6/134660265/vuzejebu_lesonozo_rarexor_nalilidozibufu.pdfIn PDF document text
    • https://rivibufoxaz.weebly.com/uploads/1/3/0/7/130776478/mupovipu_zafix.pdfIn PDF document text
    • https://nejavedejelije.weebly.com/uploads/1/3/4/3/134336697/3765630.pdfIn PDF document text
    • https://kodidorimo.weebly.com/uploads/1/3/1/3/131380292/9c8e02802.pdfIn PDF document text
    • http://topcreditcheck.info/swimming_pool_sand_filter_valvev85hv.pdfIn PDF document text
    • http://proita.space/18548972028xip5z.pdfIn PDF document text
    • https://jinikegubu.weebly.com/uploads/1/3/4/8/134873825/lusowezoku.pdfIn PDF document text
    • http://copyright-supporthelp.com/distress_tolerance_skills_handoutbaqhs.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/fopalew/gasunorosizudolagobugi.pdfIn PDF document text
    • https://aed0ee3a-d217-4696-a563-de9ff15d6c37.filesusr.com/ugd/f80e3f_3baa4db20a16408fb4a3c549d47e0b02.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/33223055625.pdfIn PDF document text
    • https://3175e58c-9db9-4d87-bcb9-15e03531d93d.filesusr.com/ugd/c93210_19218984b3224c4285de08a838f56804.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/5296704985.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/discounted_cash_flow_cheat_sheet.pdfIn PDF document text
    • https://1a9cd40a-f0d6-44d4-a143-19288280ca2b.filesusr.com/ugd/7a13df_75776e4e6e0c45b2b49cc34c550631ac.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/retisovojor/grammaire_progressive_du_francais_a1_corriges.pdfIn PDF document text
    • https://5d94d51b-2702-4b64-8df3-eadd022f3edc.filesusr.com/ugd/2ddd39_756e7942d20d4d81b4845178432b681a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/invoice_template_free_online.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/jasunijujakexufo.pdfIn PDF document text
    • https://5849b288-062f-49f8-a71b-da420f1f00fd.filesusr.com/ugd/c068f8_dae2369a4d1d4ea6b5ad7b4b66b7b5f0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/lozodofefiliniboz.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_off00014f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F76 5300 bytes
SHA-256: 70af67083c9b9ce3acbf7a5b1fbce02732f3ebbbef6180ee9c1073d41d1b92bb
font_01_sfnt_off0001618a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1618A 12496 bytes
SHA-256: c4fb55a1d942bd05236d6de656775e67c304124cef56cfe8c9d2623c39f4e73c