Malicious PDF — malware analysis report

Static analysis result for SHA-256 754ee2551238cce0…

MALICIOUS

PDF

77.1 KB Created: 2021-05-17 10:52:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 6a7993b7e9190ba3b69627e23fd452e1 SHA-1: aeb91e14206329e2c504d7a5e2c2d239bb93cb4b SHA-256: 754ee2551238cce0f0b933d3695ad744cf39b1add40f7b568deb87fd20f147d4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Numerous embedded URLs, including those on disposable hosting and link farms, suggest a phishing or malware distribution campaign. The PDF structure and embedded content, despite being heavily obfuscated, point towards an attempt to exploit vulnerabilities or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://dugedepap.ru/strik?utm_term=the+water+is+wide+movie+jon+voight PDF link annotation
    • http://psychologyrelax.xyz/can_you_still_buy_an_ipod_nanoef8eq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417039/normal_6006b04bb9a9d.pdfIn PDF document text
    • http://dvertsoff.ru/2253712717695rt0.pdfIn PDF document text
    • http://ellmax-site.xyz/sakegotelipezito3d11d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378618/normal_6068d114f2f2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427295/normal_602a422c180b1.pdfIn PDF document text
    • http://coolstudent.space/golan_heights_tour_guidew6q20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449974/normal_602cffb034b29.pdfIn PDF document text
    • http://milanbeachs.space/socrates_philosophy8x7w8.pdfIn PDF document text
    • http://tixshopclub.fun/sims_3_world_adventures_list_of_adventuresm6faw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462980/normal_603f7e397b282.pdfIn PDF document text
    • http://magicwoolshop.com/odyssey_sci_fi_mech_rpga8k79.pdfIn PDF document text
    • http://smartcoin.design/traductor_ingles_y_espaol_gratiskflc9.pdfIn PDF document text
    • http://ashotik.space/81957523126ff1pw.pdfIn PDF document text
    • http://gabubixaj.22web.org/bedarad.pdfIn PDF document text
    • http://gratoraama.space/kajuresuzutut55sll.pdfIn PDF document text
    • http://accueilcmb.com/what_happens_when_tectonic_plates_move_away_from_each_otherqk5ao.pdfIn PDF document text
    • http://teenagetutor.net/lion_main_theme_piano_sheet_musicv884e.pdfIn PDF document text
    • http://zakumof.22web.org/fosuxisisasebakalopujeje.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dejosabo.epizy.com/free_communique_templates.pdfIn PDF document text
    • http://fevejalamozek.epizy.com/64315011849.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7db244e-ba97-4c82-b5cf-c5a66b27ddda/probability_and_queueing_theory_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04cdc59a-2000-448a-82e0-49678adc5517/73880833002.pdfIn PDF document text
    • http://sewosugopig.rf.gd/red_black_tree_insertion_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/314eec49-3db8-404d-823e-afd3e62a8c18/casio_sgw-100b_replacement_band.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_off0000eed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED3 5384 bytes
SHA-256: 13829e1bc83106c943cdc97a145d10cef08659b2b6ae48ee73f3f2142c8389c2
font_01_sfnt_off00010116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10116 10608 bytes
SHA-256: 7f04321fd071f9bbfa8513fdb7884c9c668eb8878465d7d028026e9aab0532a7

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