Malicious PDF — malware analysis report

Static analysis result for SHA-256 599feacc1b2957ea…

MALICIOUS

PDF

63.4 KB Created: 2020-03-14 15:00:33 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: dc669d7d00831e1427018f37fb84e2a1 SHA-1: 29ad56761eebf6b20f2ef222fbc3ed538af255a5 SHA-256: 599feacc1b2957ea0230a206486cfeab5d5017d970b24c22716640182b09ad50
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files on SEO-themed domains. This suggests a link farm or redirection scheme. The ML classifier strongly indicated maliciousness. The primary attack pattern involves leveraging these external links to direct users to potentially malicious content or to inflate search engine rankings.

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://819.bpmtc.com/uploads/1/3/1/1/131164257/131164257.html#love+quotes+in+bengali+free
    • http://bluebirdconcreteliftingandrepair.com/uploads/1/3/0/3/130323538/mebovojedekekej.pdf
    • http://londonmarquette.com/uploads/1/3/0/6/130604615/190e81f21b8a.pdf
    • http://johntejada.net/uploads/1/3/0/2/130272387/rusela-fizadi-wofagogobize-vuxanudog.pdf
    • http://westport-medispa.net/uploads/1/3/0/6/130640042/fubopapugade_gifekorexorapi.pdf
    • http://bdplumbingservice.com/uploads/1/3/0/6/130639922/vigopanexa_fotoruwa_nelafukum.pdf
    • http://www.thewackyestate.org/uploads/1/3/0/5/130539128/momodaduji-gelidojifexaz-vadaver.pdf
    • http://madronaband.com/uploads/1/3/0/3/130379354/zaxugefes.pdf
    • http://www.shadyacreskennel.com/uploads/1/3/0/6/130620848/mesize_tanade_nugera_nusolaraboga.pdf
    • http://smartphonefilmfest.net/uploads/1/3/0/6/130639239/jenujozonikika_bikepezewapizob_suxazopiv_ritowufedolonu.pdf
    • http://www.agelessphotographs.com/uploads/1/3/0/6/130620575/cd4ead26a0fff0.pdf
    • http://claudettefranks.com/uploads/1/3/0/7/130775503/94499a3ca4d877.pdf
    • http://www.mrpolysemous.com/uploads/1/3/0/2/130291822/rililofalugenu.pdf
    • http://www.rokuhispano.com/uploads/1/3/0/7/130739021/1f7266a4f2.pdf
    • http://carlamaebailey.com/uploads/1/3/0/6/130604767/5172435.pdf
    • http://nedwaves.com/uploads/1/3/0/3/130323957/187a60c.pdf
    • http://sciencefaction.net/uploads/1/3/0/4/130435650/zetan_godalibivi_jilipu.pdf
    • http://conservedslabs.com/uploads/1/3/0/7/130740444/babogiwujunak.pdf
    • http://www.mariano-piaf.com/uploads/1/3/0/7/130775987/netid.pdf
    • http://amandabechtelart.com/uploads/1/3/0/7/130775383/2154601.pdf
    • http://makinithappensailing.com/uploads/1/3/0/8/130814106/befefen.pdf
    • http://www.kasulisgoescalifornia.com/uploads/1/3/0/5/130590770/6781052.pdf
    • http://ictforpeace.com/uploads/1/3/0/6/130621591/3914094.pdf
    • http://sbedard.ca/uploads/1/3/0/7/130739544/bosizogajuz.pdf
    • http://sydneyvolunteers.com/uploads/1/3/0/6/130603928/rubaboroj.pdf
    • http://sbedard.ca/uploads/1/
    • 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_off00008cbb.bin
939ee5875fae774d11ebbe8d7ac1aa7ea33658f111ff166729b20415400ac5a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CBB 8176 bytes
font_01_sfnt_off0000ac5d.bin
1723f1ced37cc89d69e30f3df6281c5e5fb8989544fd4587aa75b00c91af2fd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC5D 1388 bytes
font_02_sfnt_off0000b3c3.bin
ce771b7cf8665750fe02c1ffba098d4c6db3ced832a6f2cad28781c97216f9f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3C3 20520 bytes

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