Malicious PDF — malware analysis report

Static analysis result for SHA-256 d02baf3349a37255…

MALICIOUS

PDF

80.3 KB Created: 2021-03-28 07:27:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 874726386bf13af8e09ba001a821a5a0 SHA-1: ec4f92ca0b312eafc7fe03409c7d52161baf03a9 SHA-256: d02baf3349a37255aa86b842dfe3e5f2697a05e96283a324ff40c5842989ed1b
244 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged for containing malicious redirector links and acting as a link farm. The embedded URLs, such as 'https://yafferge.ru/award?keyword=bible+concordance+king+james+version+pdf', are likely intended to lead users to phishing sites or download further malware. The document's structure and content suggest it's designed to lure users into clicking these links, potentially as part of a broader phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://yafferge.ru/award?keyword=bible+concordance+king+james+version+pdf In PDF document text
    • http://tixaman.scienceontheweb.net/modern_haggadah.pdfIn PDF document text
    • https://cdn.sqhk.co/kufagilan/ghUVqic/bad_piggies_new_version_free_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/wifepodilojo/gggjTge/talking_angela_eyes_man_arrested.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/xOif4eV/wuvexogafuvufitoxozefop.pdfIn PDF document text
    • http://raponikidosal.getenjoyment.net/referat_anemia_defisiensi_besi_pada_anak.pdfIn PDF document text
    • https://pazibeze.weebly.com/uploads/1/3/1/6/131636707/dobap_doseron.pdfIn PDF document text
    • https://regenapewafixun.weebly.com/uploads/1/3/4/3/134364718/womuwuzamomafarafi.pdfIn PDF document text
    • https://narapafugoziror.weebly.com/uploads/1/3/0/7/130775848/6290003.pdfIn PDF document text
    • https://cdn.sqhk.co/tamoravuwera/ieTGxNG/td_auto_finance.pdfIn PDF document text
    • http://ganitigusawev.mygamesonline.org/which_domain_is_best.pdfIn PDF document text
    • https://cdn.sqhk.co/gagowuname/jXihhg4/samsung_galaxy_note_9_treiber_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/bojidokagivi/gde7Dji/40229086901.pdfIn PDF document text
    • http://pejelurim.getenjoyment.net/cbt_worksheets_for_adults.pdfIn PDF document text
    • http://levitajagukog.scienceontheweb.net/autodwg_to_dwg_converter_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/sabiwizi/0hEicoa/14785401560.pdfIn PDF document text
    • https://fudosabitewixo.weebly.com/uploads/1/3/1/6/131636852/8347280.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zudupaxub.myartsonline.com/14935402418.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba1bf48a-d418-4070-a2b4-e2f16cff7739/who_is_the_most_poorest_person_in_the_world.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/631d7eb3-6b06-4241-bc0b-c0a1de731cce/how_to_use_sampler_in_garageband_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc0d7aff-3ab4-4da7-bd02-80eaa90a5cb2/lajojipasef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3609eb74-fc0e-43de-82ae-2a77ea1c27d3/vimazedavu.pdfIn PDF document text
    • http://gifidabula.atwebpages.com/yunus_cengel_heat_transfer_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/218aa865-a71b-41c3-bb52-e4e570841953/digawoxonenetufetu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFED 5864 bytes
SHA-256: 3de4d511c9b4f16e3a05cb80ff93a72fd2bea0282414ceb049d59d09513a2246
font_01_sfnt_off000103da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DA 2044 bytes
SHA-256: 39aa655f19ccebfce20e49726eabc02c922f0f52f2634c84c130839babfacbd6
font_02_sfnt_off00010cb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB1 11408 bytes
SHA-256: 0d03e56acbd0281f6b982ee4e6473d9147b60ccc36e654a65effaab2a2ef0c4f