Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d0553b5af990014…

MALICIOUS

PDF

55.6 KB Created: 2020-04-17 23:16:35 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 97b13f2c43f54dbdebe471cba2c4ac67 SHA-1: a09f72cc1cedab5411e4f33867a8a5c554d00d06 SHA-256: 0d0553b5af990014a5834b494cd4e5d1c5b7979ad3d9e1195e13c943923e87f4
136 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'link farm', which is a common technique for distributing malicious content or directing users to phishing sites. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests that the document may also be instructing users to open a password-protected archive, a tactic to bypass security scanning. The ML classifier strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://cecilyeiferle.com/uploads/1/3/0/3/130313445/130313445.html#bioquimica+medica+baynes+4ta+edicion+pdf
    • http://naomiwhiteheadtraining.com/uploads/1/3/0/5/130588779/a677ccac53.pdf
    • http://latitudefun.com/uploads/1/3/0/9/130969529/8070420.pdf
    • http://joyoflivingcenter.org/uploads/1/3/0/6/130605416/6406047.pdf
    • http://xn--i8sp6y4r4b.com/uploads/1/3/0/5/130551378/7572833.pdf
    • http://christopherreber.com/uploads/1/3/0/5/130551162/765874.pdf
    • http://thejoyofveganliving.com/uploads/1/3/0/3/130323302/545235fe06.pdf
    • http://janetgay-counselling.uk/uploads/1/3/1/4/131406444/wakiganefen-zizeka.pdf
    • http://royalriverllc.com/uploads/1/3/0/7/130739933/lipunoji.pdf
    • http://starlite.tech/uploads/1/3/1/6/131637211/lulewazem_legedo.pdf
    • http://www.pedestalreflexology.com/uploads/1/3/0/6/130604549/watevubase.pdf
    • http://thegreenbeingbakery.com/uploads/1/3/1/4/131406518/2430634.pdf
    • http://doylemovingservicesllc.com/uploads/1/3/1/3/131398493/muvibe.pdf
    • http://alphainternationalenterprises.com/uploads/1/3/0/5/130590117/galunuposuguj-gokotowijeka-kegalid-zuluf.pdf
    • http://michiganvisioncenter.com/uploads/1/3/1/4/131437530/lepode-vixajikasip.pdf
    • http://dyergroupassociates.net/uploads/1/3/0/6/130639495/eb8c6ea.pdf
    • https://inspectioncopy
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000096a0.bin
3be8f5d864b677c8735eff6fa4d30fc53ab4588da0aab770d2a116c666689921
pdf-font-stream PDF embedded font (sfnt) at offset 0x96A0 10672 bytes
font_01_sfnt_off0000bcf2.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63
pdf-font-stream PDF embedded font (sfnt) at offset 0xBCF2 16036 bytes