Malicious PDF — malware analysis report

Static analysis result for SHA-256 94cff60b26c26a70…

MALICIOUS

PDF

76.8 KB Created: 2021-03-25 12:04:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6886420fbbf1b56c0632d3ea32954217 SHA-1: 2c95cf0a754fe79ea0ef255e6681e8f0508eb478 SHA-256: 94cff60b26c26a704442ede74779fe72838d47a7a6fe6b3a2c89ca58d84a249e
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document body, though heavily obfuscated, contains text related to job searches, and an embedded URL points to a site that appears to be part of a phishing lure. The presence of external URIs suggests the document is designed to redirect the user to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jacksth.ru/wix?keyword=area+manager+amazon+salary
    • https://vajunepiw.weebly.com/uploads/1/3/2/6/132681590/2181101.pdf
    • https://static.s123-cdn-static.com/uploads/4463287/normal_6007b18513913.pdf
    • http://lenaragiguvajir.22web.org/planet_fitness_cancellation_letter_template.pdf
    • http://cookwellbakewell.com/mutewiwew050r3.pdf
    • https://cdn-cms.f-static.net/uploads/4404500/normal_601ed77e37682.pdf
    • https://cdn-cms.f-static.net/uploads/4469834/normal_603a2db1312e7.pdf
    • https://cdn-cms.f-static.net/uploads/4377098/normal_6048fee8363d5.pdf
    • https://pigebatidi.weebly.com/uploads/1/3/1/4/131482999/5416373.pdf
    • http://itwow.info/497806990880fs0f.pdf
    • https://balexasureg.weebly.com/uploads/1/3/0/8/130874281/fajaxupi_warekux.pdf
    • https://static.s123-cdn-static.com/uploads/4407781/normal_5ffd4a239ab0e.pdf
    • https://cdn-cms.f-static.net/uploads/4455657/normal_6013261f5cd80.pdf
    • https://cdn-cms.f-static.net/uploads/4459059/normal_60239f7acf185.pdf
    • https://genoduvule.weebly.com/uploads/1/3/1/4/131407197/56b3640be.pdf
    • https://cdn-cms.f-static.net/uploads/4413735/normal_6057fe4836a43.pdf
    • http://winopajabareze.22web.org/aquaculture_systems.pdf
    • https://lixubirenolona.weebly.com/uploads/1/3/4/6/134669397/zufusufo.pdf
    • https://static.s123-cdn-static.com/uploads/4476943/normal_5ff0bf15a9703.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lusuzajemofim.rf.gd/firefox_version_50_for_windows.pdf
    • https://uploads.strikinglycdn.com/files/515db1ad-b22c-490c-8c73-8614f26f5356/mechanical_efficiency_of_gas_turbine_vs_ic_engine.pdf
    • https://uploads.strikinglycdn.com/files/43f2048a-6ba7-497d-ae59-5faacc798448/kujakuf.pdf
    • http://zemadepa.rf.gd/89478274449.pdf
    • https://uploads.strikinglycdn.com/files/50359a75-9b95-4810-8d62-3d47b84cf758/whats_the_least_calories_at_taco_bell.pdf
    • https://uploads.strikinglycdn.com/files/c42df446-a7bd-45aa-b2a0-efacf9be83d4/pikasajazezubajip.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_off0000ecac.bin
0ef3dee3221b053292c3f6134f4d8472cc161aa967d5d1af6240bdc8d9446556		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECAC 5148 bytes
font_01_sfnt_off0000fe22.bin
570fbbfc9892f3129aa9ab018338b4169637697bd04fcaf54abd4725586b3ae2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE22 11708 bytes

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