Malicious PDF — malware analysis report

Static analysis result for SHA-256 2252ac3d17f809e7…

MALICIOUS

PDF

81.9 KB Created: 2021-03-31 14:12:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: c28a609e4daae345bb57acdc68335812 SHA-1: ce1943d8ec3c955884c097070b52254e95a29211 SHA-256: 2252ac3d17f809e7a2eb307556ff02424f310ce1c970e905a6190b24607a097f
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. The embedded URL and the document's apparent purpose of providing a PDF on 'angles in parallel lines' are likely pretexts to drive traffic to malicious or deceptive sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://lozipotod.ru/award?keyword=angles+in+parallel+lines+questions+and+answers+pdf PDF link annotation
    • https://cdn.sqhk.co/suxumeva/FPJjc1h/vocabulary_builder_test_prep.pdfIn PDF document text
    • https://juposuwidamad.weebly.com/uploads/1/3/1/4/131406248/jurodadi.pdfIn PDF document text
    • https://luwozupewudaxu.weebly.com/uploads/1/3/1/3/131384663/bujagipefu_sifiguvuken_fetiletawoku_relusos.pdfIn PDF document text
    • https://pofewapat.weebly.com/uploads/1/3/4/0/134018592/8020257.pdfIn PDF document text
    • https://cdn.sqhk.co/jagavibejabe/uZhgdqo/vetuxewazigeli.pdfIn PDF document text
    • https://zuveravovizopow.weebly.com/uploads/1/3/0/9/130969477/jegal_kidetafu_judajo.pdfIn PDF document text
    • https://vubenazago.weebly.com/uploads/1/3/4/3/134357699/xelegobib-rexonodizofek.pdfIn PDF document text
    • https://cdn.sqhk.co/sesijisova/dF6hbc0/88626184273.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/66d3998c-573d-472a-bb86-514ee878da47/89201763598.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ca8dcc6-c646-47a4-8fe7-9c86c311a29c/12481960081.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c22be376-4650-4f27-bd0e-9bc5ff1f9820/2016_mazda_cx-5_owner_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e00d5f0-2f1d-428f-beda-a806f4526a88/vurawepimijebutawotizegu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f728e9c-6922-4e77-91c3-924313257edd/21522287138.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7042914-55d0-4875-ac95-d1d1d14554d5/safe_haven_sales_rep_salary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e5f5636-5e00-4479-953a-50540474c6c2/75088438798.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe8af592-d492-4fa3-80e4-76a1d79072c8/5006785883.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3931d927-f181-4d60-8c1d-9747cf001e99/teaching_methods_and_strategies.pdfIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/how_to_command_and_conquer_rivals.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/how_to_fix_a_hard_drive_that_wont_read.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0778b092-83aa-4825-a13d-38d56d91c8c2/zevusas.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/40733902916.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/939b2e5c-73d8-46b7-9e6a-3981d17275f2/giloligogupapozabe.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_off00010235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10235 5416 bytes
SHA-256: 016c95de40e987a738be093a0ab5b9ae1c9e9e4aa3d7bc39085c1c788c7e5aa9
font_01_sfnt_off000114bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114BF 10880 bytes
SHA-256: 2ca23aefa97ec88b97c8cfffb10551a11687d9b57bbe2403770fcfab85c882b0