Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf14d06f2107381f…

MALICIOUS

PDF

111.8 KB Created: 2021-03-16 04:49:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f51d5f9f1fe44766d6a3693107839d1e SHA-1: 935680f2a3abf2cb310ead33fc6e0d2d4a034cbc SHA-256: bf14d06f2107381f5f11ad660d1e42650b496aae5358c4d5f945ae20c42bf9a5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a large number of external links, including a link farm, suggests a phishing or redirection attack. The primary external URI points to a URL that appears to be part of a spam campaign.

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://vilenefex.ru/123?utm_term=birthday+song+free++in+tamil
    • https://meruxanige.weebly.com/uploads/1/3/1/6/131636855/julunajulo-dirowanoxiwaza-rotigotu.pdf
    • https://rumirasikimuzib.weebly.com/uploads/1/3/2/7/132710795/46ae4e709e55a9a.pdf
    • http://pedumerik.sportsontheweb.net/christian_books_for_married_couples.pdf
    • https://belinadojo.weebly.com/uploads/1/3/1/6/131607131/tipixelebenavu.pdf
    • https://gopaxabog.weebly.com/uploads/1/3/5/3/135309926/lafuvaxosagozigoba.pdf
    • https://fazokovonopa.weebly.com/uploads/1/3/5/3/135329702/a97b84e541.pdf
    • https://wijodemarivupi.weebly.com/uploads/1/3/4/8/134861972/miwosipufojosowu.pdf
    • https://vetaneje.weebly.com/uploads/1/3/4/7/134729364/roxotelugekiwe-sesijukin-jovugukavig-xefipaji.pdf
    • https://mejodedasebedo.weebly.com/uploads/1/3/4/7/134725949/metejo.pdf
    • http://sesizuxewewax.mygamesonline.org/is_it_illegal_to_not_renew_a_lease.pdf
    • https://rutisipileriruk.weebly.com/uploads/1/3/2/7/132740940/4521400.pdf
    • https://wadamosemexijep.weebly.com/uploads/1/3/4/4/134434227/berorigovukaki.pdf
    • http://kalowodopole.mygamesonline.org/cambridge_igcse_physical_education_student_book.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://luvabokinoleg.onlinewebshop.net/30789722145.pdf
    • https://s3.amazonaws.com/takebemanijewok/pexezisezulija.pdf
    • https://s3.amazonaws.com/wujixus/kala_tamil_movie_kuttymovies.pdf
    • https://357b8bef-7330-4cfe-b31d-389db25c4d5a.filesusr.com/ugd/4c76bf_1aa367ec30ee4185a10408fa3ba6d34a.pdf?index=true
    • https://bb74f61c-7045-47bf-9a7e-968101ee373e.filesusr.com/ugd/81ef4b_bae2e19f3c2a42cd87e5e046094700c2.pdf?index=true
    • https://s3.amazonaws.com/bufipevuril/6928848101.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000161b5.bin
0841fec57057009d70332936fda8abfe7c737b407854f3f855f7f06205e5a48d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x161B5 5472 bytes
font_01_sfnt_off00017434.bin
55fde00285e1db4603782fb45ab3fbdb1dbf0c0961cc99b252368c3f99c503cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17434 12124 bytes
font_02_sfnt_off00019cc4.bin
159427b32ed66bfbde86def5e6c2992bde67dfb25400c4000a37c9b59b949b61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19CC4 16140 bytes

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