Malicious PDF — malware analysis report

Static analysis result for SHA-256 077bdbc1aa07f268…

MALICIOUS

PDF

79.1 KB Created: 2021-06-02 17:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c1c4cb36698a043769c2dd3a6174903 SHA-1: 7d68208246c769e659aa0870010133cd9db3c6d5 SHA-256: 077bdbc1aa07f2685db65848408ae31f72054e297b7dd3d9117a499ed52438fe
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that advertises a "Coreldraw serial number and activation code", suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of an external URI and the nature of the lure point towards a phishing attack, likely involving a download or redirection to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://smidgel.ru/pbw?utm_term=coreldraw+serial+number+and+activation+code
    • https://static.s123-cdn-static-d.com/uploads/4367927/normal_60b6ea0448926.pdf
    • https://cdn-cms.f-static.net/uploads/4465255/normal_60342f9081ec3.pdf
    • https://cdn-cms.f-static.net/uploads/4370541/normal_6027d82f11066.pdf
    • https://static.s123-cdn-static.com/uploads/4497348/normal_5fffbd684d9cc.pdf
    • https://static.s123-cdn-static.com/uploads/4370294/normal_5fecf47b31654.pdf
    • https://static.s123-cdn-static.com/uploads/4498971/normal_5fcab5405f2a5.pdf
    • https://cdn-cms.f-static.net/uploads/4447646/normal_600b8dba49bb5.pdf
    • https://static.s123-cdn-static.com/uploads/4447098/normal_5fedd8522d912.pdf
    • https://static.s123-cdn-static.com/uploads/4374682/normal_5ff1dd99c5765.pdf
    • https://static.s123-cdn-static.com/uploads/4417530/normal_5ff337f41b43c.pdf
    • https://cdn-cms.f-static.net/uploads/4460946/normal_603c128c9bd27.pdf
    • https://static.s123-cdn-static.com/uploads/4470972/normal_6000605d81fc1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://damopijos.pbworks.com/f/xubugipetovesuraxaz.pdf
    • http://xibosini.pbworks.com/f/grounding_method_for_panic_attacks.pdf
    • https://uploads.strikinglycdn.com/files/545381ea-0adf-4a54-a7c6-441ed644e762/barn_burning_william_faulkner_meaning.pdf
    • http://padimagofo.pbworks.com/f/ragebekuvanabuwepimoze.pdf
    • https://uploads.strikinglycdn.com/files/a28312ae-0247-4ff9-9c08-8443b1da83c6/gopunulag.pdf
    • http://bilabegape.pbworks.com/f/simple_interest_and_such_worksheet_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/83c9fb5d-bc40-4662-85f0-46b104014c41/how_many_carbs_are_subway_wraps.pdf
    • http://zelovoguvunu.pbworks.com/f/12735846613.pdf
    • https://uploads.strikinglycdn.com/files/b4318440-8efc-4abe-80da-24b9819d6089/71437352580.pdf
    • http://lokiboz.pbworks.com/f/what_is_the_swot_analysis_of_starbucks.pdf
    • https://uploads.strikinglycdn.com/files/4f4985a2-0613-4e7f-8bc7-a8e78d719051/8419388816.pdf
    • http://dawijunegolo.pbworks.com/w/file/fetch/144422619/reset_ink_level_epson_l110_software.pdf
    • http://damopijos.pbworks.com/w/file/fetch/144514446/how_many_mistakes_on_usmle_step_1.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e714.bin
2c07509e01ae4bc41aeaa820c030127f4e1bada231247519a3e5874c7b92e315		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE714 5280 bytes
font_01_sfnt_off0000f904.bin
e45eaab3a29202cfdfd5860735631d711fbb356ad4c1d63068eb9d1dd2d478db		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF904 11424 bytes
font_02_sfnt_off00011fe9.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE9 4324 bytes

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