Malicious PDF — malware analysis report

Static analysis result for SHA-256 501f1995173b2ab9…

MALICIOUS

PDF

69.6 KB Created: 2021-03-16 04:23:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 173f401ffee7acbdf7788532c1571f06 SHA-1: dc684e26a8a705404674775bf015b750bcb9620c SHA-256: 501f1995173b2ab99989f7829ff1fdf72d000d05669369a4a0fc288927a165ac
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL, https://dafemum.ru/123?utm_term=auto+rotate+screen+app, suggests a phishing lure related to an "Auto rotate screen app". Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution attempt, likely leveraging a PDF exploit or social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dafemum.ru/123?utm_term=auto+rotate+screen+app
    • https://bumitulag.weebly.com/uploads/1/3/2/6/132681993/zomesidif.pdf
    • https://sefokuto.weebly.com/uploads/1/3/0/7/130738721/jatidawasofafapunex.pdf
    • https://kenometiwu.weebly.com/uploads/1/3/4/3/134340836/ridopewolusux_zuvelaxores_giwefasefuwifa.pdf
    • https://jeduwenerapowi.weebly.com/uploads/1/3/4/6/134678879/gereketixeno-kazekutisogolep-momikiwalasago.pdf
    • https://zunurevupuvofas.weebly.com/uploads/1/3/1/4/131438471/7218763.pdf
    • https://cdn-cms.f-static.net/uploads/4381740/normal_603e6a695ea4a.pdf
    • https://dapoxegimore.weebly.com/uploads/1/3/0/9/130969679/6f9e9c2f.pdf
    • https://cdn-cms.f-static.net/uploads/4426063/normal_601c9b6fe10e7.pdf
    • https://mitiguranam.weebly.com/uploads/1/3/4/4/134456526/dcff6b1a7890.pdf
    • https://cdn-cms.f-static.net/uploads/4369158/normal_601c6a51c0a05.pdf
    • https://femulonatif.weebly.com/uploads/1/3/4/5/134501650/6987701.pdf
    • https://wagezulixi.weebly.com/uploads/1/3/2/6/132695300/meligibugobibe.pdf
    • https://static.s123-cdn-static.com/uploads/4480876/normal_5fdea61e1d751.pdf
    • https://static.s123-cdn-static.com/uploads/4474448/normal_5fc726de04a84.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5b1f8115-e9c8-4434-97d8-e08ee00d5775/custom_ranger_boat_covers.pdf
    • https://s3.amazonaws.com/loranoduzuja/90833082642.pdf
    • https://s3.amazonaws.com/pobixedele/cardiopatias_congenitas_acianogenas_pediatria.pdf
    • https://s3.amazonaws.com/xuzed/cha_cha_real_smooth_template.pdf
    • https://uploads.strikinglycdn.com/files/2631f07f-eeec-4fc7-9172-070069f05e01/why_is_my_epson_printer_beeping.pdf
    • https://s3.amazonaws.com/sazixipame/cervical_screening_guidelines_australia_2018.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_off0000d560.bin
266eea473089d5f733f1fd6f8e09d44c7741f7b8e49812ea40015a9c2c539321		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD560 4884 bytes
font_01_sfnt_off0000e60b.bin
2386b22d81dc502ade3317d58d925b33117fa377e510ba71aa30de835103b27b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE60B 10404 bytes

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