Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aeb5a09f85da6d3…

MALICIOUS

PDF

70.3 KB Created: 2021-03-27 19:26:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: be11acc96ca1151e95b52e1e8f66869b SHA-1: 6188b2487aa944da7e0f38cff6c6badd9683d7b7 SHA-256: 9aeb5a09f85da6d3a730c720cb7074ec21bcaffaf2ccab297343c84fcb024711
244 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to disposable domains and link farms, indicating a phishing or SEO manipulation attempt. The presence of a link to 'dafemum.ru' which is flagged as malicious, further supports this. While no scripts were directly extracted, the structure and heuristics strongly suggest malicious intent through redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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.
  • 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.
  • 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/award?keyword=tiptoe+through+the+tulips+piano+pdf In PDF document text
    • https://cdn.sqhk.co/kuniremolu/lJTHTAY/airline_tickets_responsive_website_template.pdfIn PDF document text
    • https://cdn.sqhk.co/vagekasip/gglagcp/46866179642.pdfIn PDF document text
    • http://rubolanir.mypressonline.com/la_vida_en_mexico_madame_calderon_de_labarca.pdfIn PDF document text
    • http://nakalabaxis.mywebcommunity.org/serta_motion_perfect_3_king.pdfIn PDF document text
    • http://burutevopu.iblogger.org/bumepuzi.pdfIn PDF document text
    • http://fudazozotakaxal.mywebcommunity.org/84878850981.pdfIn PDF document text
    • https://cdn.sqhk.co/xurazegoba/Sicjjhd/sotedagizaligovuxewito.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duloduxu.epizy.com/tugiradogurejofex.pdfIn PDF document text
    • http://pobuwejugu.epizy.com/adverts_keep_appearing_on_my_android_phone.pdfIn PDF document text
    • https://6e8b94c7-278c-4a65-9c30-8d61c93a8f31.filesusr.com/ugd/9ff9b8_93a566083a2a44adb33b7fdbceff8283.pdf?index=trueIn PDF document text
    • http://nabunuwo.epizy.com/email_extractor_for_android_free.pdfIn PDF document text
    • https://b01ec662-dec5-4f54-b977-8708717d6054.filesusr.com/ugd/07e02c_b94605d06d4c4c27959fa17ba3b4c56e.pdf?index=trueIn PDF document text
    • https://3064a0a7-8496-4b95-be1e-56094aee372f.filesusr.com/ugd/0cf4b9_2f780b6b5ede42ff9b19f0171284de2b.pdf?index=trueIn PDF document text
    • https://6c639bf1-704a-4500-b661-329758898742.filesusr.com/ugd/02d620_765280e9e50a4e5a8ef59f9f8bc649c7.pdf?index=trueIn PDF document text
    • http://wuzisop.epizy.com/marico_bangladesh_annual_report_2016.pdfIn PDF document text
    • https://8dcf3d85-40eb-4350-b789-ae6ac2c46e24.filesusr.com/ugd/21d17a_bd109b6ebdb74fcd8ad2c2d8188a5de7.pdf?index=trueIn PDF document text
    • http://jutagejefutix.atwebpages.com/35038925568.pdfIn PDF document text
    • https://181f3bdf-810f-4c34-abb3-9f3362228cd6.filesusr.com/ugd/30415f_129991d9b81345f29b35c192c2948051.pdf?index=trueIn PDF document text
    • https://c3bb11cb-ba02-405d-8462-2b4421b436e1.filesusr.com/ugd/4c7814_f20ca85238594cc08f7f9cdcd262e9f9.pdf?index=trueIn PDF document text
    • https://e44de090-c64a-4a0f-b555-2784aa0ac37b.filesusr.com/ugd/41d583_562431f094f04f02903c96ffd96a6450.pdf?index=trueIn PDF document text
    • https://4a1cfc67-5981-466d-a13b-75576fe7431f.filesusr.com/ugd/64e449_9cb3f4edc3ea46738afadea2435c2cf0.pdf?index=trueIn PDF document text
    • https://2e03c77f-99cc-4591-9807-54d8d49c9ce6.filesusr.com/ugd/759733_5f54fa4e9c43416d99fd815039722edd.pdf?index=trueIn PDF document text
    • http://tuwafexom.epizy.com/cbse_class_12_date_sheet_2019.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_off0000d1e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E0 5252 bytes
SHA-256: c9da990727fca906383a866179be2362e0b51bd588fa57d96bb0d18e8e461285
font_01_sfnt_off0000e3bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BB 11548 bytes
SHA-256: adac4feb76d1fb6662f5f25edb67e85ea7660be510808d09030c1a40b186fffe

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