Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e1286af009b821f…

MALICIOUS

PDF

77.5 KB Created: 2021-03-20 14:17:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 16b154d0b0b0a7a93468d5584c1e44d5 SHA-1: cd36de093fd75db57a6f78dfceb379638528f899 SHA-256: 3e1286af009b821f083055072d8e57bbabbfabfff38916f2c1c7587a9dc083f8
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs, with the primary one being 'https://soxebez.ru/award?keyword=audi+a4+2020+service+manual+pdf', suggesting a lure to download further malicious content or engage in phishing. The document body, though heavily obfuscated, appears to reference 'Audi a4 2020 service manual pdf', reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/award?keyword=audi+a4+2020+service+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/vekasurox/Vjjgcs1/android_mobile_latest_ringtones_free_download.pdfIn PDF document text
    • http://sogejovep.mypressonline.com/the_aeolian_islands_volcanoes.pdfIn PDF document text
    • https://cdn.sqhk.co/sazipuvaxiv/bgjjigi/63398401326.pdfIn PDF document text
    • https://lokenomosotim.weebly.com/uploads/1/3/4/4/134499182/valesusodag.pdfIn PDF document text
    • http://libutulidux.medianewsonline.com/mechanism_of_action_of_anti_inflammatory_drugs.pdfIn PDF document text
    • http://gapagal.mywebcommunity.org/75436220957.pdfIn PDF document text
    • https://sifejolo.weebly.com/uploads/1/3/1/4/131410009/ac25e4.pdfIn PDF document text
    • http://kazexajisodibu.medianewsonline.com/76422296403.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/mebefogojedele.pdfIn PDF document text
    • https://f7f2eb1f-4ce6-40bf-b337-6bcc2c9c1a95.filesusr.com/ugd/dc6899_561e0a26948342399cc68386c676f988.pdf?index=trueIn PDF document text
    • http://gipebevu.atwebpages.com/64727914285.pdfIn PDF document text
    • http://zegiwewezenaro.myartsonline.com/what_education_benefits_do_army_reserves_get.pdfIn PDF document text
    • http://vebusatoro.atwebpages.com/kafojatiravozometufaro.pdfIn PDF document text
    • http://gajutar.onlinewebshop.net/a_raisin_in_the_sun_act_3_scene_1_questions_and_answers.pdfIn PDF document text
    • https://6f672a44-e16c-4921-a0f1-e3781c0647c5.filesusr.com/ugd/bda22a_5bdab89907ad419597a5fc33e308a2ea.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/geradi/blue_planet_2_episode_7.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF43 5712 bytes
SHA-256: 337ecdceb4c01019246ec1dbf8f540ed0597bcb4517a5b91d6deb2b3688f4150
font_01_sfnt_off000102ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AD 11296 bytes
SHA-256: 8bd82fbd59b5f1d3ffac9cfa75b1a10a05e99305d0c05f5d3b8d35030cf0f006

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