Malicious PDF — malware analysis report

Static analysis result for SHA-256 07b1381eb16b4d92…

MALICIOUS

PDF

80.2 KB Created: 2021-03-29 18:25:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 68619a4f73a2bfdf6c0f031bcdefac56 SHA-1: 80b2a469d9ca9be95573eb2da77fd396d738b699 SHA-256: 07b1381eb16b4d92f0c09133eca376b37e817a9161fdd72f221030e357cff479
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs and the nature of the heuristics point towards an attempt to drive traffic to malicious sites, potentially disguised as game-related content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wix?keyword=fashion+girl+games+unblocked PDF link annotation
    • http://mikazuxo.mypressonline.com/free_chemistry_form_2_notes.pdfIn PDF document text
    • http://kimujedat.mygamesonline.org/acting_class.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385206/normal_60053a8286833.pdfIn PDF document text
    • https://kiwosetivugo.weebly.com/uploads/1/3/0/8/130874254/movuvo-momikafaja-temameveginefap.pdfIn PDF document text
    • https://siketaxugulus.weebly.com/uploads/1/3/5/3/135309361/82992c.pdfIn PDF document text
    • https://veximukexapi.weebly.com/uploads/1/3/0/9/130969798/nakemomu_lapomixafuni_tunurifi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487618/normal_5fc963087398f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478141/normal_5fde03cb1e70b.pdfIn PDF document text
    • https://wefapewirevuvik.weebly.com/uploads/1/3/4/6/134667644/kuvetisawiv.pdfIn PDF document text
    • http://rinusiwujegabu.medianewsonline.com/43409473155.pdfIn PDF document text
    • https://pewarefat.weebly.com/uploads/1/3/4/3/134361746/wulinasexowudumam.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/algorithms_in_c_sedgewick.pdfIn PDF document text
    • http://ruxenawuxovogu.getenjoyment.net/tarafinimapazinijolemipe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bdf35f3f-2719-441b-9a72-2f2981b829f7.filesusr.com/ugd/e33828_a06e509c63564ae393decb39f6d277f3.pdf?index=trueIn PDF document text
    • https://44bb6ee8-a0fe-4f72-890f-0f0a2fec05cf.filesusr.com/ugd/b65acf_1ec9db0d5f094d5ea59db7937aef5980.pdf?index=trueIn PDF document text
    • https://34fef40c-4934-4c56-b24d-59915ed92566.filesusr.com/ugd/806295_c86b4cb8cea3494db4ef6f4260359cce.pdf?index=trueIn PDF document text
    • https://a32e93c2-1aa3-4149-af29-aa5d163ab988.filesusr.com/ugd/40336e_62eda0c3223c4405890162aa5a9f7bd2.pdf?index=trueIn PDF document text
    • https://67dec473-0a9c-497c-80b1-62a4c84c5046.filesusr.com/ugd/0aab01_2d079a0a951e4281966fcae22b12971b.pdf?index=trueIn PDF document text
    • https://f3ea461b-95fd-44cf-949c-5afda193840f.filesusr.com/ugd/a48928_3f6805b327004b109d082696759c2167.pdf?index=trueIn PDF document text
    • https://aa84fbb7-d3ea-4675-94d1-3a2d808898f4.filesusr.com/ugd/661a84_b068102b9b19402383e634cc16272333.pdf?index=trueIn PDF document text
    • https://3789e5f8-265e-48cd-8836-241a044b7ceb.filesusr.com/ugd/45ef7e_fb9bdc7b1a4f4260981a51c23b71066d.pdf?index=trueIn PDF document text
    • https://9370005b-87d8-49d8-b27c-18dce193a2f1.filesusr.com/ugd/52ea04_4a2411982ce84ceb82114c5a644248ed.pdf?index=trueIn PDF document text
    • https://3b0fe5ff-7f86-489c-8138-fc984e51136c.filesusr.com/ugd/bfd78a_633e4de37a394ea097df5c66f7c9c583.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_off0000fb67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB67 5512 bytes
SHA-256: c2dc8286092313e292f648e5aafe6390967ddbf3720a8b4ef226d7133d9eca8a
font_01_sfnt_off00010df9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF9 10880 bytes
SHA-256: f38da88c6da3c119d9c7aef94cdba3eb12e72c32ccb8dec4eabcfa0ea4c42a89

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