Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f7a0385d31cb6a5…

MALICIOUS

PDF

40.5 KB Created: 2020-04-15 02:36:37 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d366bae61ac9bb2160d4ae1bd7bf35b5 SHA-1: d6c7f79a3bcdb7c805a522976ad3369c00eb86b5 SHA-256: 7f7a0385d31cb6a58eb092172e4a6d9ba31b1d007d207467f8c7133bf5012b89
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are numerically or generically named PDFs, suggesting a link farm designed to host malicious content. The primary lure appears to be a fake download for an "Picsart editing master apk" hosted at ialmusic.com. While no scripts were explicitly extracted, the PDF structure and extensive link farm indicate a high likelihood of malicious intent, possibly involving the download of further malware or redirection to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 http://ialmusic.com/uploads/1/3/0/7/130739686/130739686.html#picsart+editing+master+apk
    • http://vociconnesse.com/uploads/1/3/1/4/131437012/7188612.pdf
    • http://beyouboxes.com/uploads/1/3/0/2/130291438/bowepuxepo.pdf
    • http://kendurden.com/uploads/1/3/1/4/131453194/ledubiga_fagubazapamugu_xinogogir_wejakuwar.pdf
    • http://digitalgypsi.com/uploads/1/3/0/5/130588346/d39a22.pdf
    • http://leisurecmhc.com/uploads/1/3/1/4/131453208/d861605fbe7197.pdf
    • http://kimduyentrannguyen.com/uploads/1/3/0/4/130435774/3924252.pdf
    • http://revivesupportservices.com/uploads/1/3/1/6/131637030/a8b556b9592f.pdf
    • http://chunkithefrenchie.com/uploads/1/3/0/2/130287883/vosexufedotabebif.pdf
    • http://greensheepasia.com/uploads/1/3/0/5/130588728/gapajuseneb-rukomokever-nuwilo-seranala.pdf
    • http://montalvinmanor.org/uploads/1/3/0/9/130969019/829fb7b84395.pdf
    • http://swiftpropertymaintenancellc.com/uploads/1/3/1/3/131397934/1c454.pdf
    • http://burzykowski.net/uploads/1/3/0/4/130488780/2e7b3.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007639.bin
3fd5b9d8de9ea6fb2931edcd9b70c11b2a80d6c5bbd25151dae9e55d38902d9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7639 8276 bytes

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