Malicious PDF — malware analysis report

Static analysis result for SHA-256 79234cd78fb404a2…

MALICIOUS

PDF

33.5 KB Created: 2020-05-17 18:40:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: edbab4194734321ad3885d163d246b3c SHA-1: 2aae21beaaa04f195ecf33ad75b842812add0817 SHA-256: 79234cd78fb404a25fdfadeab959267b4f254e04f8b96e15f450874dcc5c9529
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a PDF link farm. The ML classifier strongly flagged this PDF as malicious. The document body, though partially corrupted, contains text related to 'Dish tv remote guide' and the authoring application, suggesting a lure to potentially malicious content hosted on numerous domains. The primary attack pattern involves redirecting users to a network of external PDF files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://grapeapes.org/uploads/1/3/1/4/131452934/131452934.html#dish+tv+remote+guide
    • http://melodygabrielle.com/uploads/1/3/1/3/131379477/12fc046ff48b95.pdf
    • http://ivfv2.com/uploads/1/3/1/4/131408502/nepevozexul_diruresezova_vulures_bifubob.pdf
    • http://manekulture.com/uploads/1/3/0/7/130739564/4885ad05839713.pdf
    • http://jennifergasser.com/uploads/1/3/0/2/130289729/fejido.pdf
    • http://popknotevents.com/uploads/1/3/0/6/130620746/8179986.pdf
    • http://coserapartamenty.pl/uploads/1/3/1/0/131070377/wevulis-momamugari-xezapemana-sipokug.pdf
    • http://refreshmymarketing.com/uploads/1/3/1/3/131383515/nebinefir-gufasodewoxuvu.pdf
    • http://learnthebibleinayear.net/uploads/1/3/1/4/131436978/7424711.pdf
    • http://cloughmarine.com/uploads/1/3/0/8/130814479/b44a51f38.pdf
    • http://wear2care.org/uploads/1/3/1/0/131071111/bakawoguxonip.pdf
    • http://printsign.se/uploads/1/3/1/4/131438356/zugodoxoxubupa-pujizero.pdf
    • http://strategicortho.com/uploads/1/3/0/4/130483584/gezevipaxu_rebujole_vadiboziw_xasej.pdf
    • http://levelupwithlisa.com/uploads/1/3/0/6/130621569/watapipe-rafejekevek-sajupomuwepuko.pdf
    • http://universal-excellence.com/uploads/1/3/0/4/130475877/b498a82.pdf
    • http://myosotisdesgns.com/uploads/1/3/0/4/130435898/xidolis.pdf
    • http://cameronjonessculpture.com/uploads/1/3/1/4/131454932/lotepuresaxuf.pdf
    • http://ilovesmiley.net/uploads/1/3/0/6/130620353/balugebapotono_kupovamefupezir.pdf
    • http://huelsingtrucking.com/uploads/1/3/0/6/130639450/gixefejadodukofekib.pdf
    • http://jtkleckconsulting.com/uploads/1/3/0/5/130551247/nomuf_daxafope.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_off00005786.bin
07cd6f558fb9e562560fe961d396702f6b9c49f8ee9cca8ebd3b9ee4be473b50
pdf-font-stream PDF embedded font (sfnt) at offset 0x5786 10240 bytes