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) First seen: 2020-09-04
MD5: edbab4194734321ad3885d163d246b3c SHA-1: 2aae21beaaa04f195ecf33ad75b842812add0817 SHA-256: 79234cd78fb404a25fdfadeab959267b4f254e04f8b96e15f450874dcc5c9529
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, as detected by the PDF_SEO_LINK_FARM heuristic. These links point to various domains and appear to be part of a link farm or SEO spam campaign. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, and the document body is heavily obfuscated, but the sheer volume of outbound links suggests a malicious intent to redirect users to potentially harmful content.

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 PDF link annotation
    • http://melodygabrielle.com/uploads/1/3/1/3/131379477/12fc046ff48b95.pdfIn PDF document text
    • http://ivfv2.com/uploads/1/3/1/4/131408502/nepevozexul_diruresezova_vulures_bifubob.pdfIn PDF document text
    • http://manekulture.com/uploads/1/3/0/7/130739564/4885ad05839713.pdfIn PDF document text
    • http://jennifergasser.com/uploads/1/3/0/2/130289729/fejido.pdfIn PDF document text
    • http://popknotevents.com/uploads/1/3/0/6/130620746/8179986.pdfIn PDF document text
    • http://coserapartamenty.pl/uploads/1/3/1/0/131070377/wevulis-momamugari-xezapemana-sipokug.pdfIn PDF document text
    • http://refreshmymarketing.com/uploads/1/3/1/3/131383515/nebinefir-gufasodewoxuvu.pdfIn PDF document text
    • http://learnthebibleinayear.net/uploads/1/3/1/4/131436978/7424711.pdfIn PDF document text
    • http://cloughmarine.com/uploads/1/3/0/8/130814479/b44a51f38.pdfIn PDF document text
    • http://wear2care.org/uploads/1/3/1/0/131071111/bakawoguxonip.pdfIn PDF document text
    • http://printsign.se/uploads/1/3/1/4/131438356/zugodoxoxubupa-pujizero.pdfIn PDF document text
    • http://strategicortho.com/uploads/1/3/0/4/130483584/gezevipaxu_rebujole_vadiboziw_xasej.pdfIn PDF document text
    • http://levelupwithlisa.com/uploads/1/3/0/6/130621569/watapipe-rafejekevek-sajupomuwepuko.pdfIn PDF document text
    • http://universal-excellence.com/uploads/1/3/0/4/130475877/b498a82.pdfIn PDF document text
    • http://myosotisdesgns.com/uploads/1/3/0/4/130435898/xidolis.pdfIn PDF document text
    • http://cameronjonessculpture.com/uploads/1/3/1/4/131454932/lotepuresaxuf.pdfIn PDF document text
    • http://ilovesmiley.net/uploads/1/3/0/6/130620353/balugebapotono_kupovamefupezir.pdfIn PDF document text
    • http://huelsingtrucking.com/uploads/1/3/0/6/130639450/gixefejadodukofekib.pdfIn PDF document text
    • http://jtkleckconsulting.com/uploads/1/3/0/5/130551247/nomuf_daxafope.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5786 10240 bytes
SHA-256: 07cd6f558fb9e562560fe961d396702f6b9c49f8ee9cca8ebd3b9ee4be473b50

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