Malicious PDF — malware analysis report

Static analysis result for SHA-256 40af35337f2ef3f5…

MALICIOUS

PDF

82.4 KB Created: 2021-03-31 04:50:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73798edd6796f28aa5d8f10ff278cf21 SHA-1: e0404d18c04c614d8871c88373b5083f12103a38 SHA-256: 40af35337f2ef3f5a480a5eb5b5edf0fe5222d12af013b5047ef68f82db1a251
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, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to chromatography, aligning with the phishing attempt.

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://ponafet.ru/award?keyword=difference+between+adsorption+and+partition+chromatography+pdf
    • http://izzzaaa.space/100363505316f5rg.pdf
    • https://cdn-cms.f-static.net/uploads/4375517/normal_603131edd04b9.pdf
    • http://sovetnik53.ru/bahu_begum_serial_title_songz2rio.pdf
    • https://cdn-cms.f-static.net/uploads/4464297/normal_600d88c0912ca.pdf
    • http://sipataj.sportsontheweb.net/how_to_reset_kenwood_dpx501bt.pdf
    • https://static.s123-cdn-static.com/uploads/4481166/normal_5ff64a287d3c0.pdf
    • http://vekvelo.ru/westlife_video_songs_with_lyrics_freee9aeh.pdf
    • http://lamakexo.scienceontheweb.net/cg_police_admit_card_download.pdf
    • https://cdn-cms.f-static.net/uploads/4367648/normal_603143f18e5b6.pdf
    • http://kijofizovurisos.medianewsonline.com/legal_profession_uniform_admission_rules_2020.pdf
    • http://ketaton.mywebcommunity.org/42702509323.pdf
    • https://cdn-cms.f-static.net/uploads/4452395/normal_604d849a2905b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://3c1ad7ec-bfc7-452d-a92a-0d22078d3251.filesusr.com/ugd/c6e823_ad1b2912b22b48b491ca9468e5144f36.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b543ad56-4b01-41ff-8708-6c613499a53c/miller_and_levine_biology_free_online_textbook.pdf
    • https://c83cbd6e-a134-4b49-ba12-49f24c654ad9.filesusr.com/ugd/904a8b_be45f1b53e2843468e504a94ae29c8c3.pdf?index=true
    • https://5ee0d2ad-6486-47ce-ab7d-0e7b2bae4193.filesusr.com/ugd/bc0d1e_4c2ef55bb9c44cd8b77c6f0a5f9b34ee.pdf?index=true
    • https://264aa3b4-28a3-4a3b-9cf4-afdf28ba9476.filesusr.com/ugd/28a074_9437e801f8944889886b01d7edbc4c63.pdf?index=true
    • http://butorinowu.myartsonline.com/sumevafepadig.pdf
    • https://b5f169ef-6bcf-4d19-a24b-32bdc9dd7a5f.filesusr.com/ugd/2e79a6_b1970cf1ab2342c9b257b271c2ec0934.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ad7499e7-1928-4ccf-8732-2418f1a71ec3/97166123699.pdf
    • https://uploads.strikinglycdn.com/files/dab29e70-ab02-4b4a-b603-129e23eafac2/32842221133.pdf
    • https://6e3eaeb2-b9dd-4462-8b56-96c59beebd9a.filesusr.com/ugd/dcc11b_a37e62481e7e40f3885ae267280e3de2.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f57a.bin
0fd254216d446fca821df4ba71632cd9a08662ca15c47dff81af29738fe4faa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF57A 5656 bytes
font_01_sfnt_off0001089a.bin
b26f7cbd733b71f624bed3089d5655fda5cbe52e383c368b20e89fc30a152e9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1089A 10776 bytes
font_02_sfnt_off00012d9c.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D9C 4324 bytes

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