Malicious PDF — malware analysis report

Static analysis result for SHA-256 57c4e901180d95a4…

MALICIOUS

PDF

76.4 KB Created: 2021-04-07 12:35:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e3de207daf4f9ec08e959ebea3bc1af SHA-1: 6ce19d718cd0525aa48b662431530cc9a6b72a16 SHA-256: 57c4e901180d95a4a8865fbd36ed57105b057a28a40059172a6c1939c9c3c565
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL that, when visited, likely leads to further malicious content or a phishing page, disguised as a job description. The PDF structure and embedded content suggest an attempt to exploit user trust for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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://golowaki.ru/aws?utm_term=director+of+service+job+description
    • http://creditpm.com/kopokogidoxoriz4w783.pdf
    • http://yandex-delivery.cc/the_waverly_inn_manhattanrmvk4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rofagarurazope.rf.gd/52150903305.pdf
    • https://s3.amazonaws.com/zasepo/xufaboxepalepajigadow.pdf
    • https://s3.amazonaws.com/sinadi/91350012375.pdf
    • http://xejidomu.rf.gd/form_reg_156_nc.pdf
    • https://ecfc1f44-6648-4072-bff5-6ee4adcfbe4f.filesusr.com/ugd/e5a943_3da6bb7113f643ffbee35bc33a9a8a33.pdf?index=true
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_c566201cd68f4117a07f9edc87522f3b.pdf?index=true
    • https://5b2b9875-3923-4577-9ef6-0527498c95e7.filesusr.com/ugd/4e6dd5_5968f50bafa74d3c81d6ae3142c6710a.pdf?index=true
    • https://254b3b0b-79dc-4992-827c-fd4bb3db3178.filesusr.com/ugd/f515ca_4883b45edb5d4e37a894a4e3ca4e1b78.pdf?index=true
    • https://s3.amazonaws.com/lodazojamuva/12420018473.pdf
    • https://s3.amazonaws.com/varolexexus/how_to_take_down_the_graco_pack_n_play.pdf
    • https://s3.amazonaws.com/kubafezin/59479588715.pdf
    • https://246406bc-bb0d-4f29-baed-d8a6153a9543.filesusr.com/ugd/3ddeef_35be66c4efee4ab1bb91e88c897157ae.pdf?index=true
    • http://rexawisoza.epizy.com/best_resume_templates_for_freshers_word.pdf
    • https://4f640d82-8365-4c22-93d6-dbd3427c3fb0.filesusr.com/ugd/55e8b7_a0ca46f08a9349f68f0709d2ac5a84e3.pdf?index=true
    • https://f495c71d-628d-4070-9a3d-b699cbb46ba4.filesusr.com/ugd/d99ef3_93355f9309e14062b5ffd0d74f33d591.pdf?index=true
    • http://tinejamuwaki.epizy.com/lifujaroperasunujinibul.pdf
    • https://s3.amazonaws.com/tiluwisulepam/safety_first_ear_thermometer_directions.pdf
    • https://s3.amazonaws.com/jedaxopopuko/76630900411.pdf
    • https://cbf60184-924b-4e65-abc2-244eb733ec12.filesusr.com/ugd/9a25f9_a2bf787ecd434190b02291079c4bdd58.pdf?index=true
    • http://gejopap.rf.gd/food_allergy_and_anaphylaxis_guidelines.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecdd.bin
bd459b84027fafc0180f825e8b0f54a1cc9ecf0d2e97af0896727b3c164ae3ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECDD 5180 bytes
font_01_sfnt_off0000fe9e.bin
6f4da607efdf831da7f88f38f725a42405488b14c49dcab5190d771a9ae500f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9E 11096 bytes

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