Malicious PDF — malware analysis report

Static analysis result for SHA-256 817c010a5957215d…

MALICIOUS

PDF

75.8 KB Created: 2021-06-14 05:38:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9529df47414ff92554c271de866928c8 SHA-1: 3eff7339ee5c170815c51a5fd563200ab5c54e17 SHA-256: 817c010a5957215da8d9acf355f648b6336f048ce9f6caf6117e828d7f7297ea
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users. The primary lure appears to be 'after we collided full movies online', directing users to the malicious domain `chcial.ru`.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://chcial.ru/pbw?utm_term=after+we+collided+full+movies+online PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370078/normal_60468f071b117.pdfIn PDF document text
    • https://suziviwibemenaf.weebly.com/uploads/1/3/4/4/134485417/4008468.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445338/normal_601ad7cdea928.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495055/normal_603bf08ade7ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487918/normal_603844fde6d06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_60268699ebf48.pdfIn PDF document text
    • https://fuvetowonilup.weebly.com/uploads/1/3/1/3/131383456/4628993.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449973/normal_6023fbd33a541.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495837/normal_60bcd7fde3a45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480749/normal_605ef06916824.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387938/normal_5fdaeb2ac3bd1.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4380682/normal_60b5197d1cd2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466135/normal_604e42792e9eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381547/normal_6048f4696aff3.pdfIn PDF document text
    • https://fepiwifir.weebly.com/uploads/1/3/4/6/134676425/sojibetejideka_jigediripagus_fojobepubolup_tesamudapike.pdfIn PDF document text
    • https://vodefuba.weebly.com/uploads/1/3/4/6/134688083/6794419379.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456369/normal_5fdff2a9e98ed.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/86f1eead-b581-43b1-b8eb-4d687aa96edf/1053015023.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3c126b4-d4db-4ad9-af6b-a218d82286ed/simple_human_soap_dispenser_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/571ab65a-1a58-439c-8d6b-79357ce170f2/ghatna_chakra_reasoning_book_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3212925c-b177-4aed-a326-5b73ea1c9caf/92582835633.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_off0000ebc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC9 5096 bytes
SHA-256: 2d5f273e3e3708bde4c4ce67fb67f43f9b3bba60339e8ac9dfc29b6109c7de0f
font_01_sfnt_off0000fd26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD26 10916 bytes
SHA-256: 9d817b37bf397f4f893b8542945cb832b476f5054d29c5a21027fcaf4e476876