Malicious PDF — malware analysis report

Static analysis result for SHA-256 29334418f8c7e7be…

MALICIOUS

PDF

74.4 KB Created: 2021-03-18 23:21:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da8398a9b0ba9a2a18f010801e21aaa3 SHA-1: 796c03e23fc949f3f076fb002efcaf0a9e1a8230 SHA-256: 29334418f8c7e7be4bbc82679e45ee92a08efd6389886d12d5d089bddfdf0141
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to numerous external URLs, many hosted on disposable domains, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the PDF's structure point towards an attempt to exploit users by redirecting them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • 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://ponafet.ru/award?keyword=because+he+lives+hymnal+pdf
    • http://firstsecu-paypal.com/94349163317zbd8l.pdf
    • https://cdn.sqhk.co/nedupugifuka/piatHhi/16276350208.pdf
    • https://jezelide.weebly.com/uploads/1/3/0/8/130874318/8852863.pdf
    • https://cdn.sqhk.co/letarezetap/CsaOhdD/77800013952.pdf
    • https://naruvemekojesez.weebly.com/uploads/1/3/4/6/134685524/8801350.pdf
    • https://dupazenulejafu.weebly.com/uploads/1/3/4/3/134331878/7893268.pdf
    • http://reduslimitalia.website/rheem_gas_water_heater_troubleshooting_codesj2mn4.pdf
    • http://uablog.website/cosmos_neil_degrasse_tyson_streaming_vfof8q0.pdf
    • https://naziwimirup.weebly.com/uploads/1/3/4/3/134371197/sevaga-dapevikes-sewewobugoman.pdf
    • https://cdn-cms.f-static.net/uploads/4428341/normal_6043771b733be.pdf
    • https://basosogufu.weebly.com/uploads/1/3/4/6/134682995/82cc6332e237.pdf
    • https://wosobariwosamu.weebly.com/uploads/1/3/4/3/134372044/megusawubepuwij_lozojutakavor_vijapijolafuz.pdf
    • http://xuxikurov.mygamesonline.org/calculator_magic_tricks.pdf
    • https://static.s123-cdn-static.com/uploads/4450896/normal_5fddab451c345.pdf
    • https://tepugajir.weebly.com/uploads/1/3/0/8/130874129/6971463.pdf
    • http://gejurabek.getenjoyment.net/synthesis_of_azo_dyes.pdf
    • http://glasshookahcatering.com/how_are_the_4_goals_of_psychology_accomplishedmpr3p.pdf
    • http://myirn.icu/134322840501hx4e.pdf
    • https://vixodago.weebly.com/uploads/1/3/4/7/134716619/8079320.pdf
    • https://static.s123-cdn-static.com/uploads/4365607/normal_600015dde6888.pdf
    • http://tobufupevujuma.mygamesonline.org/78151616612.pdf
    • https://static.s123-cdn-static.com/uploads/4447912/normal_5ff98b8d6eef9.pdf
    • https://cdn-cms.f-static.net/uploads/4388156/normal_5fdc6c9e00426.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xifimerin.onlinewebshop.net/31180029365.pdf
    • http://kavezusi.onlinewebshop.net/94367693493.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e208.bin
f6e19d3538d3d592e9cc12a493f814caea05b7d9c96ff50a63753451e35b8d0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE208 5508 bytes
font_01_sfnt_off0000f4b8.bin
bd991ffc366bd6fd2d8194570ae7dbcdc4d8b5a1fc317d5e08da4190dbc4d69c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B8 10932 bytes

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