Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2ecc46797118266…

MALICIOUS

PDF

76.4 KB Created: 2021-03-20 11:56:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff07911c1eca5927018145c2b495eeed SHA-1: 93a9deb5924bb0a44362bd24fc6e741cd855ae69 SHA-256: d2ecc46797118266f35c287fcaebb4687aa4d00d01335ceb638ceaa320d366bd
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier, indicating a phishing attempt. It contains a large number of external links, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the overall structure point towards an attempt to distribute further malware or phish for information.

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/award?keyword=best+day+of+my+life+piano+sheet+music+free+pdf
    • https://cdn-cms.f-static.net/uploads/4378405/normal_6037c9dba33b9.pdf
    • http://zootime.store/newesodupujiwarexutit6xej.pdf
    • http://i-men.ru/xaxokarzum08.pdf
    • http://filanion.online/moxomabamigo22zh.pdf
    • https://fabisinutufonos.weebly.com/uploads/1/3/5/9/135993578/vitejoje.pdf
    • http://kefets.xyz/fileice_survey_bypasser_onlinemfuc5.pdf
    • http://raffle.website/bits_business_information_technology_solutions6mzl8.pdf
    • https://kekoweditolig.weebly.com/uploads/1/3/2/6/132683085/9718b729.pdf
    • https://cdn-cms.f-static.net/uploads/4391611/normal_6027483e6abb8.pdf
    • https://fewojejano.weebly.com/uploads/1/3/4/3/134348079/lajixax.pdf
    • https://wafanipo.weebly.com/uploads/1/3/2/6/132695839/480104.pdf
    • http://milanomoda-italy.website/wobenazivoteth0pfu.pdf
    • http://dreamingdeveloper.com/tolemadomufabidkw32.pdf
    • http://all-gopro.com/big_note_piano_sheet_music_free74zvx.pdf
    • https://static.s123-cdn-static.com/uploads/4454051/normal_5fe52dbc2694f.pdf
    • https://static.s123-cdn-static.com/uploads/4422385/normal_5ff658baac40e.pdf
    • https://cdn-cms.f-static.net/uploads/4499651/normal_60498da8de91c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://05282879-aed3-4f16-ac14-d534add4d4bd.filesusr.com/ugd/0f8b7c_36cc1212f21d43f6b3357a95d5fb75b1.pdf?index=true
    • https://be1d055c-b83b-422e-9e68-1bf13cef350c.filesusr.com/ugd/5b1e3c_ac1367eac32f412585b874ed4447a5fd.pdf?index=true
    • https://75ca6b5e-a470-4e0e-8004-b00a9f1721b4.filesusr.com/ugd/1e4819_e8754a86fcd34e34b3279b136b16a329.pdf?index=true
    • 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_off0000ecad.bin
682db423f94a39db5406097f6e28cf8ec5c2fadc481e1c43e5a76e945b294704		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECAD 5544 bytes
font_01_sfnt_off0000ff6c.bin
57fed3e17e492f9ac9fc58dcd1e0e0e503a4afa15dbad975a4d5729579eae7df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6C 10732 bytes

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