Malicious PDF — malware analysis report

Static analysis result for SHA-256 e621a811fa75e294…

MALICIOUS

PDF

49.0 KB Created: 2020-04-02 03:50:57 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 288774b7d0076313873c7ba417a7259f SHA-1: 649fdc6e08bfaa93db19cf262a8b9583ac632334 SHA-256: e621a811fa75e294e2f1888afb6eced3ed0d79f561ca19e5334c6c8c6634adca
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of embedded URLs pointing to various domains, many of which follow a pattern of numeric slugs and are likely part of a link farm or SEO abuse scheme. The ML classifier strongly indicated maliciousness. The primary attack pattern appears to be redirecting users to potentially malicious content hosted across these numerous domains.

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://mjmentertainconsult.com/uploads/1/3/0/5/130541462/130541462.html#vales+de+amor+que+poner
    • http://taxcompetitionui.com/uploads/1/3/0/7/130739699/tubefojumip_kusobus_lupezanega.pdf
    • http://cedarhillcatering.com/uploads/1/3/0/7/130776526/lezavogolalefimaf.pdf
    • http://blissfisher.net/uploads/1/3/0/6/130605203/zebef.pdf
    • http://mrandersonllc.com/uploads/1/3/0/9/130969281/ef9dd1601c248b.pdf
    • http://beauxbijoux.shop/uploads/1/3/0/3/130323547/vadobazuta_jesapimotafexid_derarofuk_fapafepo.pdf
    • http://smartboardclub.com/uploads/1/3/0/6/130620979/d42bf1da0e1268.pdf
    • http://neasoto.com/uploads/1/3/0/3/130323214/e1f92.pdf
    • http://bctee.com/uploads/1/3/0/2/130289692/eabc89.pdf
    • http://mrgatewoodcody.com/uploads/1/3/0/5/130551375/4596911.pdf
    • http://ninesquareventures.com/uploads/1/3/1/4/131407705/kimixomabuja.pdf
    • http://casey-alvarez.com/uploads/1/3/1/3/131379699/c9ce6.pdf
    • http://roxboxgifts.com/uploads/1/3/0/2/130289800/bukogonigofumo.pdf
    • http://beesbizz.com/uploads/1/3/0/3/130379362/kurejonaxuxexutibe.pdf
    • http://jcmaphotography.com/uploads/1/3/1/0/131070820/78b42ecdbc523.pdf
    • http://jchambersconstruction.com/uploads/1/3/0/3/130313383/vuwitakej-jugowutajisiwa-dutawo-wefusoz.pdf
    • http://rebeccareynoso.com/uploads/1/3/0/5/130543099/8924948.pdf
    • http://housebustersllc.com/uploads/1/3/0/4/130436410/xanodulu-fodup.pdf
    • http://goodn3wsgirl.com/uploads/1/3/0/2/130271126/ranajomipiw.pdf
    • http://restage.tv/uploads/1/3/0/2/130289310/zejelosobapuvo-lujurim-nitasi.pdf
    • http://excitinge.org/uploads/1/3/1/3/131378916/fasalowivel-diwotowageged-fuvomafij-motaga.pdf
    • http://catholiccharitiesasf.org/uploads/1/3/0/5/130539179/vunubitis.pdf
    • http://edgeheadphones.com/uploads/1/3/0/5/130542948/6354403.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007553.bin
d6d1a11d7a40f9a40709808050c2271b50dde18668f2cb3501fc02ef1a96ca88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7553 8716 bytes
font_01_sfnt_off00009515.bin
83459e82cebe561b9e65dda6a09953c9e35f75e5df0fa62a624e1833cc5b8086		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9515 1708 bytes
font_02_sfnt_off00009d7c.bin
41d76994df9762ef17dd45980d79f3d56e30cdeb381494e3dd2c56f137125746		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D7C 16448 bytes

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