Malicious PDF — malware analysis report

Static analysis result for SHA-256 2825323432fc89f6…

MALICIOUS

PDF

72.3 KB Created: 2020-11-14 20:46:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 008b707718eca61dea58cf8271b24966 SHA-1: 5ff13bba0ac42d1423ab50364a2ddb1b6d50187c SHA-256: 2825323432fc89f617c348103ad2ca82b4e1393a796d4eff12153dbdbcab6fe7
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection strongly indicate maliciousness, likely for phishing or malware distribution. While no scripts were explicitly extracted, the presence of numerous external URLs points to an attempt to lead the user to a malicious resource, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://trafffi.ru/strik?utm_term=punyalan+agarbathis+2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427519/normal_5fab501a9c25b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470981/normal_5fa5441eba065.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380070/normal_5faa8b94f3597.pdfIn PDF document text
    • https://xawiwewediwo.weebly.com/uploads/1/3/4/0/134017039/069f0e45b072481.pdfIn PDF document text
    • https://xedonafu.weebly.com/uploads/1/3/4/4/134486379/bivuxuvekakokiseb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384155/normal_5f8fa4c250442.pdfIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/916cccd3-c8cd-4511-93df-648839fe6378/bidodijala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a98f53aa-e937-4b57-a2b5-5f3d6bd77e85/thor-x_10_million_candlepower_spotlight_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/vibenawomesutedaxunigi.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/demiwawofitigimefobe.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/ball_pectin_strawberry_freezer_jam_recipe.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/mavagufeserasamuburiwoma.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/modagaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1247f040-2a1b-4960-ae35-eb96943d8829/paparadigijukaris.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0e6b7c5-6fed-45c0-87df-40c3936d6cc3/puzewalejobejunutipij.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
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000dd49.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xDD49 5300 bytes
SHA-256: 85a1fa7ede8bb1e4b922676805551ea3897aceb6729b4353ec770c7eae6c3e0b
font_00_sfnt_off0000cb38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB38 5320 bytes
SHA-256: 65e2bb48451f6457d447ce2b7a54dc9db494a12cbf923b66f7720a0a8d390a26
font_02_sfnt_off0000f0f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F5 10240 bytes
SHA-256: f62944c8ddabbafdacd1f88c0ffb87ab2c2dacc2d4329a7167f6851cb0a3f7f0

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