Malicious PDF — malware analysis report

Static analysis result for SHA-256 53c000f07eb7ae2f…

MALICIOUS

PDF

80.6 KB Created: 2021-03-02 12:45:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 75ddd1e0d38877fc821e42b12e72b614 SHA-1: 512c2e6db5bc617907a19145e370a4bdda4ac49c SHA-256: 53c000f07eb7ae2fa53ee5733e23b80d04433438b3ad7f16cde9767006fb52b5
156 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as a phishing trojan. It contains numerous external links, including one to 'pelibifir.ru', suggesting a phishing or link-farming attack. The PDF structure and heuristic firings indicate it's designed to redirect users to potentially malicious content, likely as part of a broader phishing campaign.

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 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.
  • 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://pelibifir.ru/award?keyword=driver+mixer+behringer+xenyx+302+usb PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4501380/normal_6026989d01782.pdfIn PDF document text
    • https://sukaxivex.weebly.com/uploads/1/3/4/8/134895869/1148498.pdfIn PDF document text
    • https://jiwonilasipa.weebly.com/uploads/1/3/4/3/134313366/3345713.pdfIn PDF document text
    • https://rebavunegiluzu.weebly.com/uploads/1/3/4/4/134497465/tosomifinabuwag-zobifuz-nikodisotasab.pdfIn PDF document text
    • https://cdn.sqhk.co/pavoraxebute/cHBMQjf/the_information_processing_perspective_blank.pdfIn PDF document text
    • https://pasorizafam.weebly.com/uploads/1/3/4/0/134096756/53e0e30a4.pdfIn PDF document text
    • https://lawagupavuraxap.weebly.com/uploads/1/3/4/6/134616311/4859045.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460231/normal_600293eaa2b3b.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/dhbheFa/rerekosedubumipasubad.pdfIn PDF document text
    • https://cdn.sqhk.co/pimepojuti/ghMhgiE/9628725742.pdfIn PDF document text
    • http://pazadixokumox.sportsontheweb.net/new_jersey_residential_lease_agreement_with_option_to_purchase.pdfIn PDF document text
    • https://farigelud.weebly.com/uploads/1/3/4/2/134266281/faxuxakewe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/bollywood_horror_old_movies_free.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/dajum.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/suruw.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/atlas_of_human_anatomy_for_the_artist_stephen_rogers_peck.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/31029042797.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_off0000e0a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A0 4156 bytes
SHA-256: 6fb5848c9a09488af2a0333720758b2e88fc3b38d974d1eb850113e56bfa852e
font_01_sfnt_off0000ef41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF41 5664 bytes
SHA-256: 94a6ed0adbe135a215f80a7846d9a05c5f88561af18880f3ea5a7f1288056127
font_02_sfnt_off00010280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10280 15736 bytes
SHA-256: 85c22dda363f307dc00a58f5443f44f961b05e0ac7f27383288ea4013ae4678f

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