Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dc8dbb607c41f5c…

MALICIOUS

PDF

66.0 KB Created: 2020-12-11 12:35:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2940f21e5539ba96522e7765dd4ab5e4 SHA-1: dc413b2daf194d67984efcf6a2e87cceb715f977 SHA-256: 0dc8dbb607c41f5c023e8f6ef7b60bbeb0954ee08fc868b0c6960176e9cec07b
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an external URI pointing to 'trafftec.ru', which is likely used for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to a 'Jade dragon dragonvale breeding guide', which is a common tactic to entice users to click on malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://trafftec.ru/aws?utm_term=jade+dragon+dragonvale+breeding+guide
    • https://static.s123-cdn-static.com/uploads/4447253/normal_5fcebb4b571f3.pdf
    • https://cdn-cms.f-static.net/uploads/4403806/normal_5fa11fc93eb38.pdf
    • https://derutibedevore.weebly.com/uploads/1/3/4/3/134354066/vunokigaji.pdf
    • https://kuruxodevudule.weebly.com/uploads/1/3/4/7/134728431/1211fde840d.pdf
    • https://sobexezawatu.weebly.com/uploads/1/3/4/9/134903145/pafukesul.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc10afc403f5353fd968892/t/5fc2676e173fb5383bf086b0/1606575983728/14490853223.pdf
    • https://static1.squarespace.com/static/5fc52a646b97992eb5777856/t/5fc813d790a4f8549d691537/1606947800537/57112617046.pdf
    • https://s3.amazonaws.com/bodajaku/best_attitude_punjabi_status.pdf
    • https://static1.squarespace.com/static/5fc30157c6d96458362fd63e/t/5fc62dc164571256540ed742/1606823362240/equalizer_and_bass_booster_pro_apk_latest_version.pdf
    • https://static1.squarespace.com/static/5fc714a4f784ea51367e2728/t/5fca6bc0a9cf1148261950b0/1607101379578/nani_sound_button.pdf
    • https://s3.amazonaws.com/wulotugadag/book_review_template_high_school.pdf
    • https://uploads.strikinglycdn.com/files/2bd2162a-89b0-48b7-ba80-471e7a0dbe8e/descriptive_survey_research_method.pdf
    • https://static1.squarespace.com/static/5fc10ac260f2895dc1e8a19d/t/5fc2a9d99d79364840e4b7a4/1606592989275/arhaus_sullivan_coffee_table.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_off0000c533.bin
c85ee0f5c0353220b50b7a161740cb9e8da1eb975a7cc31e4cad2c971b21b5ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC533 5004 bytes
font_01_sfnt_off0000d64c.bin
2c8d823e1209b36f762836c12349c1ff42fa400be4e09bbe72fb9db47592f26b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD64C 10920 bytes

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