Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eb88a4aa3846e1d…

MALICIOUS

PDF

82.4 KB Created: 2021-04-20 00:35:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b7a05e707812c44a13faea085a9a50fb SHA-1: 25c069c0bf1b53782836ec3497783e4003867834 SHA-256: 8eb88a4aa3846e1d4b0360020cb3ac5e70e77f696b065742d25ebf6a80946258
146 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing operation. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to trick users into calling a phone number, a common tactic in tech-support scams and callback phishing. While no scripts were explicitly extracted, the presence of PDF URIs and the overall structure suggest potential for exploitation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://lozipotod.ru/strik?utm_term=how+to+turn+on+the+jam+speaker PDF link annotation
    • https://cdn.sqhk.co/rifusofuwedi/hgghjdZ/annoying_orange_splatter_up_mod_apk_unlimited.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369507/normal_60223e35bfeeb.pdfIn PDF document text
    • https://cdn.sqhk.co/zefafulolit/JHcgcic/77704623203.pdfIn PDF document text
    • https://cdn.sqhk.co/jalotenabo/QwhbghB/mikecrack_roblox_titanic.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476767/normal_60619da5e15af.pdfIn PDF document text
    • http://zukesijinizik.mywebcommunity.org/argandoa_macroeconomia_avanzada_2.pdfIn PDF document text
    • https://daginunus.weebly.com/uploads/1/3/4/5/134597638/durisatom.pdfIn PDF document text
    • https://medivurufif.weebly.com/uploads/1/3/1/4/131407406/zegoj.pdfIn PDF document text
    • https://tifutijije.weebly.com/uploads/1/3/2/6/132682998/mivorogukegenij-labulewiziz.pdfIn PDF document text
    • https://cdn.sqhk.co/furabafezuse/PnGibT9/star_wanderer_space_arcade_games.pdfIn PDF document text
    • http://zuxuvikewi.sportsontheweb.net/ragofila.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459926/normal_602673f50b492.pdfIn PDF document text
    • http://gejesixave.scienceontheweb.net/gopro_hero_3_white_specifications.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/wajufifenoxuj/75251619150.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42c3e649-1339-4169-8ed8-36cae8cdbd44/86826526036.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3363640-fe4b-40bf-90e9-8f77894d5a7a/ipod_nano_2nd_generation_factory_reset.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/apache_commons_csv_csvformat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6b3053f-8051-46ca-aac3-ad885fdec6d9/bisifisidiwenuxajonudu.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/what_is_a_good_detox_diet_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b762789-ae92-4dd8-accc-213937336750/how_to_draw_a_girl_on_procreate_step_by_step.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79f4e33a-6ce9-4fb9-84d9-912be3e7aa2e/dobumadezuxabak.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_off0000f16a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16A 5052 bytes
SHA-256: 7c765045b47df26ccd1d33bbccf3163e3f18df818575bcdaa2e2634bf135554f
font_01_sfnt_off00010277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10277 12380 bytes
SHA-256: 211720df1529ef82f8aa83d63ec46f04bc64dca498c5b6004ea244a38427bbb9
font_02_sfnt_off00012c3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C3F 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34