Malicious PDF — malware analysis report

Static analysis result for SHA-256 70121224ecc8d08a…

MALICIOUS

PDF

75.3 KB Created: 2021-01-13 16:34:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 44b7c704d9cc87126db7ea051ee8886a SHA-1: b9d8685a252c5efa0c73436f82d73014b3b9f870 SHA-256: 70121224ecc8d08a95c0fb31d4683587a6a0ae98cef5715ab4b3a99abb35fc3e
252 Risk Score

Malware Insights

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

This PDF document contains embedded links that point to known malicious redirector infrastructure and a link farm hosted on disposable domains. The document body, though heavily obfuscated, suggests a lure related to a 'vehicle sale agreement'. The presence of numerous external PDF links and a critical heuristic firing for malicious redirectors indicates a phishing or scam attempt designed to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://gettraff.ru/123?utm_term=vehicle+sale+agreement+between+two+parties In PDF document text
    • https://static.s123-cdn-static.com/uploads/4392439/normal_5ff1173cce731.pdfIn PDF document text
    • https://site-1174730.mozfiles.com/files/1174730/living_a_boy_s_adventure_tale_chords.pdfIn PDF document text
    • https://site-1176076.mozfiles.com/files/1176076/viridian_city_pokemon_tower_defense.pdfIn PDF document text
    • https://cdn.sqhk.co/jagapifa/gjjNrhi/69086288790.pdfIn PDF document text
    • https://cdn.sqhk.co/xopimuje/hvhdXjV/super_stick_classic_golf_club_manual.pdfIn PDF document text
    • https://site-1192273.mozfiles.com/files/1192273/text_to_speech_mac_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366360/normal_5f9132da8ebd9.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/hdjd7QF/dynasty_legends_true_hero_rises_from_chaos_mod.pdfIn PDF document text
    • https://site-1218469.mozfiles.com/files/1218469/33553851369.pdfIn PDF document text
    • https://site-1240055.mozfiles.com/files/1240055/pefevigiramebudolazix.pdfIn PDF document text
    • https://kotonimurapuva.weebly.com/uploads/1/3/4/4/134440920/xigolufesiruzibobam.pdfIn PDF document text
    • https://cdn.sqhk.co/midubevine/Fhijgb3/ps4_remote_play_controller_not_working_android.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/farezelof/44241140537.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/38289847843.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/challenge_song_video_mr_jatt.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_off0000e9cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CD 5544 bytes
SHA-256: cb21c04df379c6394da138c6fe5baafd6da40667976836292220d7888c9e288e
font_01_sfnt_off0000fc93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC93 10408 bytes
SHA-256: e4a2679e53f3ea532c5f4ae8cb459ef18fbb511e554fc0143e333ffe03de3669

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