Malicious PDF — malware analysis report

Static analysis result for SHA-256 6458e075217ad0cd…

MALICIOUS

PDF

77.2 KB Created: 2021-03-15 00:33:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: fa54b55dc6e7a29ad3c2ac4b120e6cc4 SHA-1: 09427d03ef5704a6449281d5cc32164bb73f0cf3 SHA-256: 6458e075217ad0cd11f55d6bf5d1eac887ca414f0ba3a3a35ef2c6271bf51570
244 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://dafemum.ru/wix?keyword=governor+of+poker+2+hack+ios', which is presented as a lure for a game hack. The document also contains a large number of external links, many hosted on disposable domains, indicating a link farm used for SEO poisoning or distributing further malicious content. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/wix?keyword=governor+of+poker+2+hack+ios In PDF document text
    • http://fopokigife.mywebcommunity.org/17227868239.pdfIn PDF document text
    • http://saxobupazes.sportsontheweb.net/92649529016.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/85ec8a57-5551-473a-be56-77f5d1463052/rized.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/feea7afe-d1f5-4c75-89c4-0c5aded7098e/50704130217.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/175a2996-5a94-472d-a5e4-50df9185b44b/55006066395.pdfIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_f2ee92d9b71d4be29354eaf5e7582fa3.pdf?index=trueIn PDF document text
    • http://jofisakukobi.rf.gd/b._a_ka_full_form_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19ae6091-0450-4fe7-bfba-7725a8b5afe7/barbie_doll_poem_explication.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/80211744180.pdfIn PDF document text
    • http://tizexazebubo.atwebpages.com/crps_physical_therapy_protocol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5715f737-0327-447f-b08a-3a8e6e3e0488/how_much_do_medical_laboratory_technicians_make_an_hour.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/free_printable_clock_face_templates.pdfIn PDF document text
    • http://nibubatovavav.atwebpages.com/how_to_connect_phone_to_kenwood_kdc-bt318u.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/ebay_india_app_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/820a770f-9874-432d-98f3-6ccf4c9c74dd/dd_essentials_rulebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/096a29f3-329c-46cf-8f5d-9803d8deba03/a_link_to_the_past_3ds_walkthrough.pdfIn PDF document text
    • https://61df3396-90b5-4b69-a3ae-475c9da6ebc5.filesusr.com/ugd/516574_c6654bb3b74c4419916d1ed021df571e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/remeranexe/serapumorikebezexotewid.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/72590846606.pdfIn PDF document text
    • http://wojobawezelo.rf.gd/43698124232.pdfIn PDF document text
    • https://1864c106-1a4f-4194-99fb-dabd5a0af450.filesusr.com/ugd/17b194_65110421382c4b9596e15bec063d804b.pdf?index=trueIn PDF document text
    • http://zimopup.myartsonline.com/nelson_math_book_grade_5_answers.pdfIn PDF document text
    • https://8d2868a3-57b7-484c-81f6-493c1c4f5daa.filesusr.com/ugd/a8ca0f_b0e133afd7a2467e9e03c4cea178d5e1.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_off0000f070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF070 5360 bytes
SHA-256: ef0a4c0ade7c08844b86be2f943125b273dea3e6791f496f320a4a888ae28303
font_01_sfnt_off000102b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B4 10712 bytes
SHA-256: ff63ac9ea3e656f922f256712cc1b62794518345f61d32e9b78c077541cd519b