Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdd94096ece47969…

MALICIOUS

PDF

101.2 KB Created: 2021-05-18 05:43:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22b12723c051224107f82e66702a4db1 SHA-1: 4beb4039e4e058b5061dc5c8e39cf9fb7b173eed SHA-256: fdd94096ece479692576532400a3bd6a317394fd27015d0ab5b4591d4156ae17
126 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm and has been flagged as malicious by ML classifiers and ClamAV. The document body, though heavily obfuscated, suggests a lure related to dreams. The primary IOC is a URL that likely hosts a malicious payload or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://pelibifir.ru/strik?utm_term=what+do+dreams+say+about+your+subconscious
    • https://popewike.weebly.com/uploads/1/3/1/4/131407195/bd43d3.pdf
    • https://xovodozavaso.weebly.com/uploads/1/3/1/0/131069890/b3a0f287.pdf
    • https://takewozijofu.weebly.com/uploads/1/3/2/6/132682119/733f7.pdf
    • https://bipekafus.weebly.com/uploads/1/3/0/7/130776646/satiwojemeli_lozaduvovik_vekejodikirox.pdf
    • http://xexodejefapupel.iblogger.org/bisection_method_questions_and_answers.pdf
    • http://jopuvalipi.22web.org/biology_book_free_class_12.pdf
    • http://xagidodovinudu.iblogger.org/qsc_touchmix_16_multitrack_recording.pdf
    • http://vorusobowa.66ghz.com/wugomala.pdf
    • http://gatuxovadi.iblogger.org/hollywood_thriller_full_movies.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/kefiperizonofu/most_common_gre_words_magoosh.pdf
    • http://barajirotufaz.rf.gd/68862053817.pdf
    • https://uploads.strikinglycdn.com/files/32ed084b-a74a-42df-b5d5-db26674d747d/puzepipizibati.pdf
    • http://jifejibi.epizy.com/lisogitomutenagumup.pdf
    • https://uploads.strikinglycdn.com/files/72465abc-25bd-40b2-9fab-6443c896109e/jizigubinemapibusimosuwas.pdf
    • http://retuguru.epizy.com/gonem.pdf
    • https://uploads.strikinglycdn.com/files/7a069106-0334-4815-b4b8-4dc3d46db44b/black_and_decker_toast_r_oven_broiler_under_counter.pdf
    • https://s3.amazonaws.com/fujadabez/youth_football_drills.pdf
    • https://s3.amazonaws.com/kefodek/game_theory_arg_gate_1_answers.pdf
    • https://s3.amazonaws.com/kijelopazekune/fobimatuvinotuvoxigame.pdf
    • http://rifezovepon.rf.gd/letter_c_activity_worksheets.pdf
    • https://s3.amazonaws.com/loranoduzuja/98882021085.pdf
    • http://petizitopebil.epizy.com/57914085346.pdf
    • http://vituzitozitu.epizy.com/zabewumarobo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013e65.bin
d33a525a2104525fa7587d460dd34d724571d182748bd2b1c9701f27faaf870e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13E65 5284 bytes
font_01_sfnt_off00015046.bin
aa034b74a8e2f21f692043dbf81a4d8aa2e7d69cc13a0ee95e34e700c311cceb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15046 11512 bytes
font_02_sfnt_off00017720.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17720 4324 bytes

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