Malicious PDF — malware analysis report

Static analysis result for SHA-256 81bcbc18a8d3eb91…

MALICIOUS

PDF

41.8 KB Created: 2020-04-02 21:44:37 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 32ce8de19e3cd22755e95b08a208edc6 SHA-1: 8cdda6129eb6091ba08f4763ccdcd7fe547dcd23 SHA-256: 81bcbc18a8d3eb914a9ca07981516372d9070f16fb39fd760fbe2cb2c94c93de
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains URLs that are part of this link farm, suggesting the primary purpose is to direct users to potentially malicious external content or for SEO manipulation.

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://junobeautyhairandcare.com/uploads/1/3/0/8/130814020/130814020.html#razonamiento+deductivo+e+inductivo+p
    • http://kristinarevphotography.com/uploads/1/3/0/4/130488228/cee04f7d.pdf
    • http://independantpattesting.com/uploads/1/3/0/6/130604378/9efbba.pdf
    • http://swinboroughtech.com/uploads/1/3/0/9/130969199/nesovav-zexerozuj-jikiwa.pdf
    • http://despedidasolterabarco.com/uploads/1/3/0/6/130620841/4741043.pdf
    • http://azautorecon.com/uploads/1/3/0/9/130969748/6946046.pdf
    • http://getseenongoogle.com/uploads/1/3/0/4/130435943/ganupimezobi.pdf
    • http://engpossible.com/uploads/1/3/0/7/130740589/55173c4fa4.pdf
    • http://dandelionday2017.org/uploads/1/3/0/5/130540592/8351797.pdf
    • http://cybersecuritydomain.com/uploads/1/3/0/3/130323164/d7c574aad5d0a.pdf
    • http://basilandwoodie.com/uploads/1/3/0/6/130621845/kuwovavitof_wobugub_budom_gozafejiko.pdf
    • http://shoplennons.com/uploads/1/3/0/6/130604799/riwarudowejorapaz.pdf
    • http://aaronag.net/uploads/1/3/0/9/130969895/7487368.pdf
    • http://longislandhandymansc.com/uploads/1/3/0/8/130874248/388c06457e.pdf
    • http://easternshorechess.com/uploads/1/3/0/4/130483191/patibenevalir-bopiwanuvapu-jipulozituka.pdf
    • http://phreexone.net/uploads/1/3/0/8/130874489/linomikojokepel-rekofifamanuler-korowakuvakiz.pdf
    • http://devauzet.de/uploads/1/3/0/6/130621331/pojegaju_taduzafita.pdf
    • http://creativemeasures.org/uploads/1/3/0/4/130483848/vevakizijaruzom_meravurize.pdf
    • http://scatteredinword.com/uploads/1/3/0/4/130435516/d77cd.pdf
    • http://mrwexler.com/uploads/1/3/0/6/130621803/ef6589d.pdf
    • http://purchasetheroi.com/uploads/1/3/0/7/130776836/favudib.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a96.bin
33d5e76d84bf6f4f973ea55fd93a6f57a2eb1205093337aa6e74c4d946ce2cf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A96 9420 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.