Malicious PDF — malware analysis report

Static analysis result for SHA-256 336883726b5ce34d…

MALICIOUS

PDF

78.7 KB Created: 2021-04-01 04:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d83bf1abf8f574085ddb1e40234e22bb SHA-1: 935d1c36c29a81b1e4bcae826a2dd28023d9e0a6 SHA-256: 336883726b5ce34dadd10695618f0f11926a6f2e13d7ea40aa36b1a4ef2993ad
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic to redirect users to malicious sites. The document body, though truncated and obfuscated, contains keywords related to search queries, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 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://soxebez.ru/award?keyword=jeep+wrangler+yj+parts+manual+pdf PDF link annotation
    • http://zegiwire.sportsontheweb.net/pediatric_pneumonia_treatment_guidelines.pdfIn PDF document text
    • http://setokanekema.mygamesonline.org/l_adjectif_verbal.pdfIn PDF document text
    • https://finubakexa.weebly.com/uploads/1/3/1/3/131383318/985cc119f3c273b.pdfIn PDF document text
    • http://tells.fun/87193624184b7zt9.pdfIn PDF document text
    • https://mipapipav.weebly.com/uploads/1/3/4/0/134012398/7227057.pdfIn PDF document text
    • http://lesuxofozadize.mygamesonline.org/seiko_solar_watch_battery_replacement_near_me.pdfIn PDF document text
    • https://bibatajikoxego.weebly.com/uploads/1/3/5/3/135315017/6002848.pdfIn PDF document text
    • http://jalazekesofijot.medianewsonline.com/jerajibobodobati.pdfIn PDF document text
    • http://creditscorecard.info/139806006174pukz.pdfIn PDF document text
    • http://kexolifowuj.medianewsonline.com/gusud.pdfIn PDF document text
    • http://profoto22.ru/how_to_program_baofeng_uv-5r_for_police_scannermd71b.pdfIn PDF document text
    • http://lnstagram-blue-ticks.com/58963813241o3sa0.pdfIn PDF document text
    • http://lessonsonline.site/xenisikinqdvw.pdfIn PDF document text
    • https://tojewenegekov.weebly.com/uploads/1/3/4/5/134502344/tegupogi-zuwigubuj-zemeta.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c580675e-8888-491d-8c80-3106eaac86fb.filesusr.com/ugd/c8a981_cebffe7179764c22b6b73fe74dcf1e57.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kubafezin/honda_3000_watt_generator_weight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a412ed11-5202-43a2-ac40-5e4378fccae0/hp_photosmart_d110_wont_scan_to_computer.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/how_to_clean_go_kart_torque_converter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c43b6bdf-bbb6-439c-b772-71850c6921d0/mini_speakers_for_portable_dvd_player.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92f42a45-e8e7-4b6e-8b9f-8a8f9c5b65ff/how_to_train_your_dragon_3_netflix_us.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/22008524757.pdfIn PDF document text
    • https://e222b685-7c7f-4cee-b050-218328c89257.filesusr.com/ugd/c0232f_d70abfd3181f4ef388be8791864cb639.pdf?index=trueIn PDF document text
    • https://95c758d6-fd33-43c6-b5d0-f1f55e07e946.filesusr.com/ugd/cb0188_5b07d89147e14c7481733774c5fba22e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wekibik/4756471391.pdfIn PDF document text
    • https://2efabd41-1f95-43d0-8245-5f8eb9267247.filesusr.com/ugd/2f4ddf_d14bdff242dc4f9893b1360e3780b0ad.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_off0000f24b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24B 5620 bytes
SHA-256: c3ba690b49680d79b5c38471201185984dbb9aec91202d82a17402ef8178d608
font_01_sfnt_off00010570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10570 11740 bytes
SHA-256: 568e385fe96c53b8001a475a2c0db47ba38647fcbc11d7085ac18033e7f878aa