Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7c6ecfd6472ef46…

MALICIOUS

PDF

368.7 KB Created: 2021-06-02 06:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0ea5ff910cdad656e083a95efacd46b SHA-1: 95a5706651d6f68531eb3d8f9a65d2807b97a171 SHA-256: d7c6ecfd6472ef46ed2afe178e3607cb43f1dbe4e16ee1cdc44c1fda678a13f0
104 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains an embedded URI pointing to a suspicious domain, resalured.ru, which is likely intended to host or redirect to a malicious payload. The presence of a 'download button' heuristic further suggests a phishing or social engineering attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6588

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://resalured.ru/123?utm_term=aharoni+regular+font
    • https://cdn-cms.f-static.net/uploads/4417817/normal_6045aa92d7ce0.pdf
    • https://cdn-cms.f-static.net/uploads/4410962/normal_6035fcdca5bf5.pdf
    • https://wisetigu.weebly.com/uploads/1/3/4/3/134357320/3172947.pdf
    • https://cdn-cms.f-static.net/uploads/4449410/normal_6059ed181a1fb.pdf
    • https://static.s123-cdn-static.com/uploads/4470218/normal_60066991a2de7.pdf
    • https://lixebofupasiwik.weebly.com/uploads/1/3/2/3/132303312/zisesanomitijuk.pdf
    • https://static.s123-cdn-static.com/uploads/4475854/normal_5ff8c091b388e.pdf
    • https://jodawozuwiki.weebly.com/uploads/1/3/1/4/131437728/5e909338097.pdf
    • https://cdn-cms.f-static.net/uploads/4427504/normal_60302e83ed297.pdf
    • https://static.s123-cdn-static.com/uploads/4420589/normal_600604992d6b9.pdf
    • https://cdn-cms.f-static.net/uploads/4469105/normal_5fe7aba6615bc.pdf
    • https://bitoxusimafitaj.weebly.com/uploads/1/3/4/3/134311342/momemuzomedimi_sisisituposov.pdf
    • https://cdn-cms.f-static.net/uploads/4389793/normal_60417e085790b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/60092bc6-e3b8-4aaf-8dc9-ca6f8e598e05/verb_tense_exercises_esl.pdf
    • https://uploads.strikinglycdn.com/files/606ae87d-5d60-4981-8a98-3efb208dea4c/jibibaxezoposatuw.pdf
    • http://mepijewaj.pbworks.com/w/file/fetch/144426291/49611279687.pdf
    • https://uploads.strikinglycdn.com/files/d851a046-0ae2-4929-8b43-4067c3d564f7/vesulakuvojazupifutilezis.pdf
    • https://uploads.strikinglycdn.com/files/38c1c707-24c7-4e57-a0af-e9bc2dd77521/bemevibek.pdf
    • http://joxupakager.pbworks.com/f/1766524717.pdf
    • http://dibesusajob.pbworks.com/w/file/fetch/144470592/full_body_cardio_workout_at_home_for_beginners.pdf
    • http://zajozote.pbworks.com/f/14405761491.pdf
    • https://uploads.strikinglycdn.com/files/6fe56a54-d23a-404c-828f-20b497d27121/suvazafebasunif.pdf
    • https://uploads.strikinglycdn.com/files/7b546a37-041d-4d1a-8694-9ddfc9378d34/prentice_hall_gold_algebra_1_teaching_resources.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
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00053a85.bin
5d265ee27cd6db69783dbb4874e6f89b415ce0003fb70191eca7a0c73761a8cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53A85 5856 bytes
font_01_sfnt_off00054e87.bin
55c083d75200395e7715e5be6cfe9c3fe9abba4b1e866b3a129d31a0ec41cb48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54E87 4720 bytes
font_02_sfnt_off00055e87.bin
27af511033c5a43b638737397b9692d1bf8ec69ba84053434f6a4e854383cb76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55E87 6500 bytes
font_03_sfnt_off00056fc4.bin
f8ec117616432f5ec501e5b9c6ce53aca1861ea280a36a7daf5b0e31bc4fed28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56FC4 17408 bytes
font_04_sfnt_off0005a339.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A339 4324 bytes

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