Malicious PDF — malware analysis report

Static analysis result for SHA-256 07bcc3d904d91677…

MALICIOUS

PDF

82.8 KB Created: 2021-05-05 22:59:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a258e5430c77b137358714292a81bfed SHA-1: ac4dd59db2c83b9ffae697c5c22746a74a754d74 SHA-256: 07bcc3d904d91677b6f8b1e3416f5412a3c7c21bfc0d464e87cb5c22ea19b123
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms or phishing campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. Although no scripts were extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xezojetit.ru/strik?utm_term=presto+pizzazz+pizza+oven+review
    • https://cdn.sqhk.co/zipirevofu/1HJlCCp/13946512484.pdf
    • https://cdn-cms.f-static.net/uploads/4454807/normal_600be5d33a2fd.pdf
    • https://cdn-cms.f-static.net/uploads/4416675/normal_606c82ddd13fb.pdf
    • https://cdn.sqhk.co/ratusobuda/a7dhdgc/52093164802.pdf
    • https://xuduwenonotowud.weebly.com/uploads/1/3/1/3/131379268/2202882.pdf
    • https://cdn-cms.f-static.net/uploads/4478952/normal_5fe63f4fcef73.pdf
    • https://lebotuzipum.weebly.com/uploads/1/3/4/5/134519329/ruboxagaruxabopodo.pdf
    • https://xarugowa.weebly.com/uploads/1/3/4/7/134733051/januk_fewukafuzobimik_nikigerumuwat_xaxikizi.pdf
    • https://rimofunoduw.weebly.com/uploads/1/3/4/5/134525219/6149469.pdf
    • https://cdn-cms.f-static.net/uploads/4458417/normal_604ce244b5098.pdf
    • https://pavadugubuwab.weebly.com/uploads/1/3/4/3/134309483/megulufusi_vepase_zomavejagupu.pdf
    • https://cdn-cms.f-static.net/uploads/4393521/normal_6013991800a65.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3cf69fc5-5359-403b-9dfe-31a0d29c83bb/dd_players_handbook_2014.pdf
    • https://5071cc05-3fa2-46b1-b944-d2523ca4b51d.filesusr.com/ugd/62e2c1_01a63e2d4a9f4f88bff9518431c5b6cb.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a41dd572-0998-4ff3-8d38-fa493666f04b/laserjet_p1102w_toner_staples.pdf
    • https://f55c6975-0091-4942-a106-dc80285e5f9d.filesusr.com/ugd/8a4248_4a07ff727fa545d3b20cb8fe39de4ba0.pdf?index=true
    • https://ca108e69-7b6b-43f0-8f16-d96ebeb8a33d.filesusr.com/ugd/79e0dc_2be4b623db19427686b026503e6b825c.pdf?index=true
    • https://327bbe42-9aa5-4ca0-80e5-6c9857058a26.filesusr.com/ugd/2b870b_90c6e94bb24a439ab0a5e7091973b4ae.pdf?index=true
    • https://59e5a08b-0d8d-455f-a3a7-35a3b781ab3e.filesusr.com/ugd/784815_b44b285e8399486983edcd4ec207cfbb.pdf?index=true
    • https://uploads.strikinglycdn.com/files/7ec24c22-0c3a-46c9-bbab-8c1b1ce203c4/chicago_manual_style_citation_book.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f205.bin
11d20f143cc97ad7a1ef11a9d0822cfe9d7f1ecb477ef7c5b84727b0de874f5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF205 4984 bytes
font_01_sfnt_off00010321.bin
9335659f9d7cd16ef668929f1c8f107833c54487a82758167c42e886764088bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10321 10748 bytes
font_02_sfnt_off00012830.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12830 16204 bytes

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