Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5d6b7b8609e25a7…

MALICIOUS

PDF

74.9 KB Created: 2021-02-17 15:27:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 810b72998929b659edbf8b4f344ecca7 SHA-1: 42edb0ff06a50bfffcd5b3c4096ffcde8d2415f6 SHA-256: e5d6b7b8609e25a792fb05c6886439b666e897ec6cbb111aa8e15ccb5d171460
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'seumenha.ru', which is likely used to host phishing content or distribute further malware. The document body, though heavily obfuscated, contains references to 'Google search image resolution' and 'wkhtmltopdf', suggesting a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://seumenha.ru/strik?utm_term=google+search+image+resolution PDF link annotation
    • http://jusapp.club/is_olympus_good_camera_brandfxbpt.pdfIn PDF document text
    • http://salonop.xyz/bhojpuri_song_hd_videoihj0d.pdfIn PDF document text
    • https://kedaregedowe.weebly.com/uploads/1/3/5/3/135321867/zezukefudemarebuz.pdfIn PDF document text
    • https://vigofamuzozovi.weebly.com/uploads/1/3/4/6/134671609/mogepibivowaximeso.pdfIn PDF document text
    • http://ebay-coupon.ru/54900621217lvm7p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416929/normal_6001d86a80405.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407788/normal_602579fce0fa3.pdfIn PDF document text
    • https://cdn.sqhk.co/jufulezamuko/Tib2hfa/how_to_get_in_shape_fast_at_home.pdfIn PDF document text
    • http://remont-kholodilnikov.website/english_diagnostic_test_elementarym6d54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463792/normal_601afec339dfa.pdfIn PDF document text
    • https://batuputuj.weebly.com/uploads/1/3/0/7/130739628/mafenonituliku_nefavatej.pdfIn PDF document text
    • https://jojobejuw.weebly.com/uploads/1/3/2/8/132815094/81d743989a.pdfIn PDF document text
    • https://segakimorepej.weebly.com/uploads/1/3/0/7/130738797/da6b54.pdfIn PDF document text
    • https://dojiladise.weebly.com/uploads/1/3/1/3/131379401/874cd.pdfIn PDF document text
    • https://mawosamaretezij.weebly.com/uploads/1/3/4/8/134860838/830c91928fc7ab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sigobija/61137954920.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/9985556125.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/gametes_are_formed_through_mitosis.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/dejunotin.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CC 5244 bytes
SHA-256: d32d060da706d783f2f6e2ebd4a610cbbef94091e625c99e0f36599fd6be3478
font_01_sfnt_off0000f980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF980 10692 bytes
SHA-256: 37ef4a6bfc3f85a561e33b79bfeafa32631e6d0fe4c6e66ee8fdbb0ae74d92f6

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