Malicious PDF — malware analysis report

Static analysis result for SHA-256 b12f1465c7ee027e…

MALICIOUS

PDF

79.6 KB Created: 2021-04-01 22:22:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 82e0eecf81121d4b97107371ad3f3678 SHA-1: fef3cb0fcae2324761eb55b3a53408de5f89b96f SHA-256: b12f1465c7ee027e34719f82b4838fb483da4cfb84a3345ac7b8968001b8f851
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 phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, contains metadata related to PDF creation and a keyword search, further supporting the lure-based attack pattern.

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://zajinet.ru/wix?keyword=ghostbusters+nice+shootin+tex+trophy+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417537/normal_60550aed91f0e.pdfIn PDF document text
    • http://zuwaweno.iblogger.org/86592317678.pdfIn PDF document text
    • http://erogan-encolumbia.site/30400654637t8inm.pdfIn PDF document text
    • http://zavarivaemvmeste.ru/4744380806888k1o.pdfIn PDF document text
    • http://astropsychology.site/pasar_de_litros_a_gramos_quimicas7f7x.pdfIn PDF document text
    • http://wiinorama.website/tales_from_the_loop_reviews_metacriticv5zoj.pdfIn PDF document text
    • http://kprovk.xyz/410793270795uoos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469617/normal_604758dd89bd3.pdfIn PDF document text
    • https://kolekidir.weebly.com/uploads/1/3/4/4/134441437/bobiwowezesono_gulon_sigagew.pdfIn PDF document text
    • http://ryursew.space/escala_de_gesell_de_desarrollo_infantily9co8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393624/normal_5fe819ad73d16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460725/normal_601469c7ecc9b.pdfIn PDF document text
    • http://ejinaya.com/50480037066v44g8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376858/normal_6042cfbbb85fb.pdfIn PDF document text
    • http://cashtanks.fun/lunizojajapepa30.pdfIn PDF document text
    • http://reassurez-moi-fr.info/duzagaziwetidalolokigontnmss.pdfIn PDF document text
    • https://nojasiputijaze.weebly.com/uploads/1/3/4/8/134869787/c33d1.pdfIn PDF document text
    • https://zudoxinegez.weebly.com/uploads/1/3/4/1/134108693/bivip-pakefulusoj-pufebonit.pdfIn PDF document text
    • https://mogewojelepa.weebly.com/uploads/1/3/4/6/134681452/gopegofaluxutawuw.pdfIn PDF document text
    • http://belkwigs.com/acrobat_reader_11._10_for_windows_79oe53.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://uploads.strikinglycdn.com/files/95c2cef8-1e0e-4585-94b0-b4e9000b3be3/dragon_age_origins_modding_guide_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82fdb106-2c11-4bff-a34c-b2a0ae42f153/ue_boom_bluetooth_speaker_setup.pdfIn PDF document text
    • http://doronelibi.rf.gd/best_places_to_buy_formal_dresses_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74d7c831-ddc5-4759-9918-9cc9dc47aa19/othellos_speech_act_1_scene_3_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdf9e11c-fdf7-4bcb-8805-fd9849bef093/99322281735.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_off0000e89e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89E 5316 bytes
SHA-256: 767623a4aad707480fc8b8e6fa007d018a6b76c67e215e8540dd06064a4de17c
font_01_sfnt_off0000fab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB9 11216 bytes
SHA-256: 4841a40452d47af24938fc15fed3bb5701fabcb2e65221548691a3361d0b3a5d
font_02_sfnt_off000120d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120D6 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333