Malicious PDF — malware analysis report

Static analysis result for SHA-256 193ff858fd0d310b…

MALICIOUS

PDF

76.6 KB Created: 2021-03-28 01:27:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 67e51ba81ded7deb41d8d20650763f11 SHA-1: 9981c98e0e8fe08a54c8a30eb8546314f5a3dcd1 SHA-256: 193ff858fd0d310b23a8b32864af1f051b5ab84f23b2ac8850fbb1fe4da59b35
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to a 'technical drawing handbook'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://maypoin.ru/award?keyword=technical+drawing+handbook+pdf PDF link annotation
    • https://cdn.sqhk.co/gewewoturila/difgcjf/demazer.pdfIn PDF document text
    • http://mixit.info/lofozaxowasivanenuditdwcd0.pdfIn PDF document text
    • http://rinobozawizuvew.iblogger.org/15141701375.pdfIn PDF document text
    • http://fazoluniguket.iblogger.org/53097271388.pdfIn PDF document text
    • http://halfraire.xyz/sosaxife3gbr9.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/irxjhpx/lojumug.pdfIn PDF document text
    • http://profmaster74.ru/8818471951rowi5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8af5639e-228c-4df0-bee0-943b6f8373ad/ac_joint_pain_exercises.pdfIn PDF document text
    • http://tiguvazigavis.epizy.com/coloplast_skin_barrier_protective_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b865576-898d-489f-9cbd-2e4f44f25136/88664101488.pdfIn PDF document text
    • http://zakivijojinikij.epizy.com/94601185173.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c166647-3655-47c6-af25-f00479728a87/57807000490.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aed5209-0702-4394-b820-66e035881676/fisasoteperovemarexanar.pdfIn PDF document text
    • http://josuzedalad.epizy.com/list_of_irregular_imperfect_verbs_in_spanish.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33fd016b-3ae5-4617-b58e-e04e1d8cebdb/proform_hybrid_trainer_elliptical__recumbent_bike_ifit_compatible.pdfIn PDF document text
    • http://fokuxukidedir.rf.gd/96583995236.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fd22bbd-3ffc-4b1a-8beb-b14063354aa1/16635235774.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3ea4417-fb2a-42d4-8d7c-9a745d44ff91/depejenelutapulegazaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b098bda0-b5a6-4e5d-8043-a64610a58be6/62033357993.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc184b3a-e9f1-4249-a0ed-d4b39fcbc028/the_monkeys_band_names.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/924b2c1d-de6c-4583-a240-63873e4c4f61/xarone.pdfIn PDF document text
    • http://povosiz.epizy.com/61866997465.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_off0000ee9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9D 5484 bytes
SHA-256: b822d4050578e95a75d78eb499955d42dc9d459941b557a8c43ee7e1594c6cbb
font_01_sfnt_off00010151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10151 10384 bytes
SHA-256: bc70c26f2bd4984028b17f67a2fa95af7d9da5bb210484331ab2445877ca159a

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