Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc1ad12fa812251f…

MALICIOUS

PDF

83.3 KB Created: 2021-05-22 18:45:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f19c98661415252d994f41aa206c99d SHA-1: a96f3591ed86a96b0d0958210e9f657a97bf3929 SHA-256: cc1ad12fa812251f6dd2db5d29e194a6f0fc4cf0aef1e693b41dca7d8a3c725c
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URI pointing to 'fokemale.ru', which is likely part of a phishing or malware distribution scheme. The document body is heavily obfuscated, but the presence of the external URI is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://fokemale.ru/strik?utm_term=the+grammar+book+an+esl%252Fefl+teacher%2527s+course+3rd+edition+pdf
    • https://static.s123-cdn-static.com/uploads/4487622/normal_5fe06db077419.pdf
    • https://cdn-cms.f-static.net/uploads/4502567/normal_601d4307c032d.pdf
    • https://cdn-cms.f-static.net/uploads/4492574/normal_604d3696477a5.pdf
    • https://cdn-cms.f-static.net/uploads/4501233/normal_60251982b5994.pdf
    • https://static.s123-cdn-static.com/uploads/4369333/normal_5fcc8e1d11ca1.pdf
    • https://cdn-cms.f-static.net/uploads/4481852/normal_60342f63ab3f7.pdf
    • https://cdn-cms.f-static.net/uploads/4368758/normal_6057a9e8abda0.pdf
    • https://cdn-cms.f-static.net/uploads/4419644/normal_6065cc6ae1584.pdf
    • https://cdn-cms.f-static.net/uploads/4476445/normal_5fe95f7a71a96.pdf
    • https://static.s123-cdn-static.com/uploads/4390323/normal_5febc4d26b437.pdf
    • https://cdn-cms.f-static.net/uploads/4445550/normal_603e427b53d89.pdf
    • https://cdn-cms.f-static.net/uploads/4484156/normal_604ce14ab56f7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/gezejoputiwinu/7564481394.pdf
    • https://s3.amazonaws.com/sinamozagemoger/transformers_alternity_bumblebee.pdf
    • https://uploads.strikinglycdn.com/files/b670c14f-a892-4cd2-9ded-8a2e731dd885/are_washer_dryer_stacking_kits_universal.pdf
    • https://s3.amazonaws.com/xomudufe/fuzupavusipejitubovuloliv.pdf
    • https://uploads.strikinglycdn.com/files/334e8edd-8df1-466d-932b-0eb570fb8433/9254878957.pdf
    • https://s3.amazonaws.com/firigugixujotov/bollinger_bands_settings_for_bitcoin.pdf
    • https://s3.amazonaws.com/setaxilitozuko/ziwufosotuvutibi.pdf
    • https://uploads.strikinglycdn.com/files/7c05be57-d05d-4a4a-913b-b0ea0d58995f/voicelive_play_presets_list.pdf
    • https://s3.amazonaws.com/zolerazowubow/the_girl_with_the_dragon_tattoo_how_many_pages.pdf
    • https://s3.amazonaws.com/jixeremipet/dakene.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f521.bin
ee16d6e5e5b7c8c7e3ad71a36c6fe79aa70dff805247aafe16bc68ab075277ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF521 5836 bytes
font_01_sfnt_off000108da.bin
3a5872842915f2a251acb2291cbd5b035848dbd61b46b9beafe0ed3dc325ac95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108DA 11308 bytes
font_02_sfnt_off00012f29.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F29 4324 bytes

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