Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c26daab78f81d47…

MALICIOUS

PDF

83.7 KB Created: 2021-04-15 20:50:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4be810128d772abe9d7c573b16bce393 SHA-1: 507ef09867a584ba62dbc7818f6649b82bb3236c SHA-256: 9c26daab78f81d476038eec1dda22b6938399983c725d8f00462b154fe13ff1e
156 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one that presents a search query likely intended to deceive users into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF. No scripts were extracted, but the PDF structure itself facilitates the attack by hosting numerous links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=where+can+i+get+sodastream+canisters+refill
    • https://cdn.sqhk.co/goluxewimabu/fgjTjil/seashine_adventures_cabo_san_lucas.pdf
    • https://static.s123-cdn-static.com/uploads/4390381/normal_5fc5c1b716a89.pdf
    • https://cdn.sqhk.co/gajeneset/RyihIhj/17114939883.pdf
    • https://palujaburufo.weebly.com/uploads/1/3/2/7/132740236/xasubufilil.pdf
    • https://cdn-cms.f-static.net/uploads/4463803/normal_606e48ed35302.pdf
    • https://cdn.sqhk.co/rogumabutur/jiuielq/pasofonuneb.pdf
    • https://loniforuwo.weebly.com/uploads/1/3/4/9/134904684/lewasidunugegufozoba.pdf
    • https://cdn.sqhk.co/woxiwovar/0Kljghf/snipers_vs_thieves_how_to_enter_codes.pdf
    • https://cdn.sqhk.co/lixejudazeza/ghjDBjb/fewowituzalukizenufewi.pdf
    • https://rivakevalitute.weebly.com/uploads/1/3/0/8/130813818/5603599.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/90111d65-14b8-47e3-b004-16c0a9a948d1/parts_of_speech_exercises_with_answers_for_grade_7.pdf
    • https://uploads.strikinglycdn.com/files/c685db08-0ce6-43ae-9f3d-77c706c751fc/what_is_the_recursive_formula_for_the_sequence_8_10_12.pdf
    • https://uploads.strikinglycdn.com/files/bed04e84-7b24-416a-9143-b3d426862e0a/vofuxutugin.pdf
    • https://uploads.strikinglycdn.com/files/e105f87c-9e14-4d41-b04d-39eee4b97e06/4026372251.pdf
    • https://uploads.strikinglycdn.com/files/d4c36f87-f6f5-410e-9f96-6b25edb1c628/68183134182.pdf
    • https://uploads.strikinglycdn.com/files/39ae32ff-b07f-4a7d-aad0-a12673105a42/51459006021.pdf
    • https://uploads.strikinglycdn.com/files/77c93d35-c863-4bf4-89c5-103a9e5fb0e2/is_potassium_nitride_ionic_or_molecular.pdf
    • https://uploads.strikinglycdn.com/files/e5083aa6-e076-4735-bf35-1e4f8cd52b30/48608378855.pdf
    • https://uploads.strikinglycdn.com/files/ef6e99c7-dd76-44ab-89e5-5f5edea4bcb2/gisawilidelawimekujiwik.pdf
    • https://uploads.strikinglycdn.com/files/22706997-89ce-4db8-9dd2-bcd8301e7c37/betty_schrampfer_azar_basic_english_grammar_with_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/1bc04f1d-d6d3-43f0-b40a-593f048c075b/nixijivorelisaxumiv.pdf
    • https://uploads.strikinglycdn.com/files/44edb710-0064-4902-b745-6cf3f050afc6/why_is_kyocera_printer_offline.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001070f.bin
20b1a31e34720f007db44d62a30fdc153365d60aae7eb981f05c2c87646e6d20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1070F 5448 bytes
font_01_sfnt_off0001197d.bin
e63b33e43111b4a7259335f267ff67ef43a348ca5eb797e6bea7635a3ca62570		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1197D 11188 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.