Malicious PDF — malware analysis report

Static analysis result for SHA-256 41044d7691565191…

MALICIOUS

PDF

75.7 KB Created: 2021-03-04 22:13:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d0ab3e467e681d37fa15e89d699f6a6a SHA-1: 1bb7fd4a3aa143abdd8b413687997d897d2935aa SHA-256: 41044d7691565191177d88f3a8e74d92de326a0ae7cec028e2d8232b8af9b5b0
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely as part of a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though partially corrupted, contains a search query, suggesting a lure to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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 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://xezojetit.ru/award?keyword=how+many+catalytic+converters+are+in+a+nissan+murano PDF link annotation
    • https://cdn.sqhk.co/xamitarerivu/1gfThdM/flights_to_miami_florida_from_detroit_michigan.pdfIn PDF document text
    • http://rinotox.iblogger.org/how_to_make_lavender_syrup_for_coffee.pdfIn PDF document text
    • https://cdn.sqhk.co/gixejefi/Niajdjj/word_cookies_cherry_8_special_level.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/hhbq8oL/chase_bank_zelle_pending_review.pdfIn PDF document text
    • http://dovulup.iblogger.org/choice_of_superannuation_fund_standard_choice_form.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwumixe/Mibibgd/apply_for_emergency_motel_vouchers_online.pdfIn PDF document text
    • http://xafesalizupapal.22web.org/mckinsey_global_institute_jobs_report.pdfIn PDF document text
    • https://cdn.sqhk.co/pibegufuxova/jgwYihy/rilakiguwanadigad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410702/normal_60272165034f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402244/normal_6004bcc39d65d.pdfIn PDF document text
    • https://cdn.sqhk.co/rufadexu/qiagfif/bicycle_racing_track.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497358/normal_5fd5f7863dbe8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485329/normal_602ca325f0e2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444378/normal_6039f7b06207a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/986f247b-c0ec-40bb-8103-c69d96292433/dokiniroveselakopamiwol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42ccf71e-10d8-4de3-99da-bbe49d286f9d/merit_badge_pamphlets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48ceb997-9c41-4456-91a3-217ea51491e5/77137032567.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbc51937-7918-49d9-b707-f4ac38312aaf/foledidokosimidezipug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07b0faba-aad3-4fd8-832c-a626c7237bb0/58965521409.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03d4eb10-eb4c-4053-829b-4cde26485559/lenovo_thinkpad_t430_specs_i7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73a5b026-4897-4f04-8ce0-6200812408eb/31178023058.pdfIn PDF document text
    • http://bexinoj.epizy.com/card_sharper_s_daughter.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_off0000deff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFF 5044 bytes
SHA-256: b7f850380af1bb2c07116c03efb024dce26c4c35b2801e7e1c925273201d7aec
font_01_sfnt_off0000f01a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01A 10184 bytes
SHA-256: 3577989a7ee5af9aadec702a0d649856ab8e3d3c024c988672450784ba9410ff
font_02_sfnt_off000112f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F6 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378