Malicious PDF — malware analysis report

Static analysis result for SHA-256 095e391872ec5c96…

MALICIOUS

PDF

82.5 KB Created: 2021-03-25 10:02:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 86b0f6085d70aaa625ccbcdcedc204a1 SHA-1: bc4a783b80731348ff9988f7accf4c8e9c64b552 SHA-256: 095e391872ec5c96e6f9cf0d7bfa50207ebc80f085d1c1cab53575cf0462980a
196 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing lure, indicated by the presence of numerous external links, including one identified as an SEO redirector. The heuristic 'PDF_SEO_LINK_FARM' suggests a large number of outbound links, potentially to distribute malicious content or engage in link farming. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to potentially harmful websites.

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
  • 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://botokaw.ru/strik?utm_term=barska+fingerprint+safe+review PDF link annotation
    • https://cdn.sqhk.co/sevijeruba/eQkLELE/muwigefu.pdfIn PDF document text
    • https://cdn.sqhk.co/zofagopipowi/S6jfwQb/battle_warship_cheats_ios.pdfIn PDF document text
    • http://kidiwutimako.mygamesonline.org/77206687038.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489407/normal_6048f655ce24d.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/seven_things_you_should_know_about_divine_healing_kenneth_hagin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453729/normal_5feb52dcc9b06.pdfIn PDF document text
    • https://cdn.sqhk.co/fakineduxafe/ieEjdge/test_plan_template_ieee_829.pdfIn PDF document text
    • http://sunakijabe.sportsontheweb.net/lefawijugoralijubimaro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://64f3f273-fd79-4cea-bc15-92b2431614e2.filesusr.com/ugd/542254_9978532734a249698dc0e4e1dc60ea03.pdf?index=trueIn PDF document text
    • http://kapirexazi.onlinewebshop.net/chapter_1_research_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/94709102652.pdfIn PDF document text
    • https://a8a2d6b8-6248-42a0-90a4-e25e421c2e59.filesusr.com/ugd/f63f29_c3ec9b65eee64e55af472c3fc2fee3a7.pdf?index=trueIn PDF document text
    • https://c941d99d-b58b-4215-81ce-525e38db2b81.filesusr.com/ugd/2dc4cf_99697aa7fc394c22bf636d7980098011.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vukusa/72920070476.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/latest_version_of_gb_whatsapp_apk.pdfIn PDF document text
    • https://67bb8873-ca08-4da4-87c0-60a8072ebff6.filesusr.com/ugd/a838c0_4e02f37a67ef4df7ac9cac95f9b1d639.pdf?index=trueIn PDF document text
    • https://e18e6c05-101e-4f41-9c4d-f518aea09dbb.filesusr.com/ugd/7972b3_f3e00a5c55684196be7aecd89968c9c6.pdf?index=trueIn PDF document text
    • https://5121d360-3808-4f61-aa44-d87cf2d9d428.filesusr.com/ugd/032e8a_3ef2d99c14ec49f3906c3fb44b1a4b75.pdf?index=trueIn PDF document text
    • http://tikomiwewo.atwebpages.com/dadagilesafebuxugaronere.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/kibimimikivud.pdfIn PDF document text
    • https://s3.amazonaws.com/jigezilor/98811700058.pdfIn PDF document text
    • https://626fb5af-1d67-41cb-86ce-204163677ff0.filesusr.com/ugd/9d869b_5c17d1fc9387425cb067d380736a14db.pdf?index=trueIn 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_off00010315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10315 5300 bytes
SHA-256: e1a7c132cdcc8ef292d342f6b8bf17b5c77052d61c9a4279dfd460a97ae82a5a
font_01_sfnt_off0001154c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1154C 11564 bytes
SHA-256: 0beb6189960d6cbc2f427b6fa86b0477e44c62d07fdeeec3407627956825d356