Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bd7aac9a35b3114…

MALICIOUS

PDF

78.9 KB Created: 2021-01-22 03:04:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a91cf627fc66b346bae2db5382ad8646 SHA-1: 7073ae2482d4f785f46b88b4d06d4ecd701ff93e SHA-256: 0bd7aac9a35b31143cb627dc89571cb34f9b2b34457417278b1c0e2251d3529e
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to disposable domains and link farms, indicating a likely attempt to redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/123?utm_term=references+to+salvador+dali+make+me+hot+monologues PDF link annotation
    • https://cdn.sqhk.co/jomububorava/Iftjahd/75372783299.pdfIn PDF document text
    • https://site-1166042.mozfiles.com/files/1166042/second_rarest_blood_type_in_the_world.pdfIn PDF document text
    • https://cdn.sqhk.co/wojusipi/geUWjfI/best_flocked_christmas_trees_uk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367922/normal_5ffa397ed1ac1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417212/normal_5fdfbe705660f.pdfIn PDF document text
    • https://cdn.sqhk.co/ributexovek/r2ibeOY/1776766366.pdfIn PDF document text
    • https://cdn.sqhk.co/sejejajoxej/iOdwI93/lefasunamiro.pdfIn PDF document text
    • https://cdn.sqhk.co/kavejufa/hiuojjS/mokipoderexenev.pdfIn PDF document text
    • https://cdn.sqhk.co/rijujonakuje/ehdtSx0/25163996344.pdfIn PDF document text
    • https://cdn.sqhk.co/bigulikexupa/jbhbghD/korulon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485457/normal_5ff28e421c385.pdfIn PDF document text
    • https://cdn.sqhk.co/nawafoxobok/Ejajgif/boxiwusukuzeguriz.pdfIn PDF document text
    • https://cdn.sqhk.co/pozigafo/a4EogcB/home_depot_3_gang_switch_box.pdfIn PDF document text
    • https://site-1177946.mozfiles.com/files/1177946/virtual_drumming_music_sheets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383137/normal_5fd8994050d57.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xomudufe/fulizi.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/kimepekogiweno.pdfIn PDF document text
    • http://midotujeg.rf.gd/79803082734.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/budget_table_template_word.pdfIn PDF document text
    • http://gonurorirezode.epizy.com/discuss_both_views_essay_template.pdfIn PDF document text
    • http://debarunuzijabe.rf.gd/aashiqui_2_movie_images_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e92e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92E 5448 bytes
SHA-256: 2375d3136c071aa417896ebd43f4f42fef4bbe9170a47c4c2bca1dbd0f892e64
font_01_sfnt_off0000fb93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB93 10920 bytes
SHA-256: 5bf814d3d91d9124644faaf13bec784abc805e385a3746d7c5d90200f2fb1a0c
font_02_sfnt_off00011ff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF3 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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