Malicious PDF — malware analysis report

Static analysis result for SHA-256 480bbf4580d77302…

MALICIOUS

PDF

78.3 KB Created: 2021-04-19 18:52:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5dd0fbc1ccb3219d187469baca171069 SHA-1: 771d2108d08a76883d41aae6e75857041dc12aec SHA-256: 480bbf4580d7730274fce5bdad0465d3e9ee3abe463b4297beb7f29a24d97f97
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://xezojetit.ru/strik', which is likely a phishing or malware distribution site. The PDF structure and embedded content suggest it's designed to trick users into visiting this external link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/strik?utm_term=developmental+biology+gilbert PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4383340/normal_5ff6acde77230.pdfIn PDF document text
    • https://cdn.sqhk.co/bumajanivosi/hakCohc/spongebob_sponge_on_the_run_movie_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wipedekis/eVNsaaC/zombie_3d_gun_shooter_mod_money_apk.pdfIn PDF document text
    • http://rofepanix.iblogger.org/liwoza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420248/normal_5fce24f6f0302.pdfIn PDF document text
    • https://cdn.sqhk.co/dizoketa/MZgi8gi/52049208608.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415045/normal_6044de57ee6a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443814/normal_600375ee42ebd.pdfIn PDF document text
    • https://cdn.sqhk.co/koxopumo/iKtdicE/gujixasilowa.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/d9262840-03c5-4c68-8e45-8ed049d0183d/54686567940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/649db303-2abe-41f8-a02e-73451c808562/leninuwavora.pdfIn PDF document text
    • https://dec4a425-646e-450a-80ca-a73a75d058ad.filesusr.com/ugd/ba3095_4212a5b9f2f949e59b8760ac04ef7101.pdf?index=trueIn PDF document text
    • https://f608bf75-187c-4b28-9621-af925c05c2b6.filesusr.com/ugd/05e3ad_2e3a014d40ba4e4f82dabb640e3a85e8.pdf?index=trueIn PDF document text
    • https://1ae094b9-110d-4377-a83c-911b29edd90d.filesusr.com/ugd/d5eada_43d264ce9844432ab2f77a2a7847cbe1.pdf?index=trueIn PDF document text
    • http://buwojilow.rf.gd/d_d_5e_character_sheet_editable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/000c4a63-1a70-477e-b4b9-3eaaefe36556/19136831180.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80f94c32-44c2-4ae2-aadc-93fe3ff0dc57/machine_learning_and_ai_are_different_names_for_the_same_thing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ee68736-874e-478e-9b7e-a3c654587c34/what_happens_in_the_last_book_of_the_after_series.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa9371d7-e8b7-420b-975d-e413462bfd58/gepujifefu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a962d64-fa1b-42b2-86ee-a1617abbea9f/somejugelibelisibapum.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_off0000f48a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48A 5260 bytes
SHA-256: 724f643ae3f0f34aa5a3f2089df6c6e64234521169157624844a234a7d627dc7
font_01_sfnt_off0001066a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1066A 11420 bytes
SHA-256: bb754fff913ef019a8c429651e4c3db3a92c1659f145ad220851ff5c18b48205

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