Malicious PDF — malware analysis report

Static analysis result for SHA-256 5be26b0f5ec27d29…

MALICIOUS

PDF

59.2 KB Created: 2020-08-09 22:42:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de17efc57efdf4227fa856a47c2b23b7 SHA-1: 318bb0799f02e2f6c92be98671b527c07ca825b2 SHA-256: 5be26b0f5ec27d297c3f306cdef249541f105bf235416cdb465b50bbd89d36fa
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary one leading to a known malicious redirector infrastructure. The document body, though obfuscated, contains text related to a syllabus and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ttraff.com/pify?keyword=b+tech+biotechnology+syllabus+2020+pdf
    • http://files.kendrickcheung.com/uploads/1/3/2/7/132740343/fuxanex.pdf
    • http://files.ahbuzicustom.com/uploads/1/3/1/4/131453636/nuxekaxadogud.pdf
    • http://files.windhorsedancer.com/uploads/1/3/0/7/130740174/lovulofemedejizarat.pdf
    • http://files.ourhousecallvet.net/uploads/1/3/1/8/131857071/semosi-kimixasobal-baxokuw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/4535/4658/files/62131877937.pdf
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/joxanefexezeputerepuna.pdf
    • https://cdn.shopify.com/s/files/1/0438/4001/2450/files/76384363941.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2953/files/31808232750.pdf
    • https://cdn.shopify.com/s/files/1/0439/6512/0670/files/enlace_polar.pdf
    • https://cdn.shopify.com/s/files/1/0435/8035/8811/files/lejegufavemiroraze.pdf
    • https://cdn.shopify.com/s/files/1/0437/0009/3083/files/botuvobiberezokowabuj.pdf
    • https://cdn.shopify.com/s/files/1/0438/5194/0000/files/lafujurirukoxiguzi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7812/3680/files/15438080895.pdf
    • https://cdn.shopify.com/s/files/1/0438/0993/1426/files/guxifiwasubafo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5177/8202/files/xilodavil.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_off000090b1.bin
864089cfd03046f056d615a249aa5f6462aeda977e380084b238d22586573d0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90B1 5768 bytes
font_01_sfnt_off0000a454.bin
229950a06db4650f449522b3273d1032a54b7aa47d396b2f4bda5fe195a38123		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA454 14764 bytes
font_02_sfnt_off0000d1b7.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B7 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.