Malicious PDF — malware analysis report

Static analysis result for SHA-256 e932fb623c4fe5dd…

MALICIOUS

PDF

37.2 KB Created: 2020-05-11 04:55:47 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d27523e0a73fe57ae0b23ddf390b3825 SHA-1: 6b0173567dd7ee25ea2951c99dca4e21a616dd32 SHA-256: e932fb623c4fe5dd5624a0c79eed36a34ca3d6771083a7aa396e568a36dd1169
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 to various domains, identified as a PDF link farm. The ML classifier strongly indicated maliciousness, and the structure suggests an attempt to manipulate search engine results or distribute further malicious content via these links. No scripts were extracted, but the sheer volume of outbound links is highly suspicious.

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://perillianconsulting.com/uploads/1/3/0/3/130313529/130313529.html#indonesia+travel+guide
    • http://app-payment22.com/uploads/1/3/0/2/130272325/faruvevaxutalo.pdf
    • http://photobros.org/uploads/1/3/0/5/130589083/6bc79965dd455c.pdf
    • http://regiusmorphs.net/uploads/1/3/0/4/130483376/536da.pdf
    • http://freedomfightersnetwork.org/uploads/1/3/1/6/131606476/2363032.pdf
    • http://mistykwilliams.com/uploads/1/3/0/6/130621238/wekogexi.pdf
    • http://foodtogove.com/uploads/1/3/0/2/130287882/tudawafisidegutodifi.pdf
    • http://mastersofcraft.net/uploads/1/3/1/4/131406289/wibukimu.pdf
    • http://healyoursoul.org/uploads/1/3/0/3/130323762/minulun-bonexeli-sonozibiwumon.pdf
    • http://kittyinphilly.com/uploads/1/3/0/6/130605089/notevepaxaxurun.pdf
    • http://hotzonefishingcharters.com/uploads/1/3/0/5/130589276/dufalabeno-nuxekagajebit.pdf
    • http://dwyercabinetry.com/uploads/1/3/0/8/130814526/batikasodezajel.pdf
    • http://heronmediagroup.com/uploads/1/3/0/6/130604502/31ecc9c96.pdf
    • http://bourioanatoliesfilms.com/uploads/1/3/0/2/130287238/0cb699339750cb0.pdf
    • http://scattrbraind.com/uploads/1/3/0/4/130483578/f9fa95375e4.pdf
    • http://furryfriendsclt.com/uploads/1/3/0/5/130551303/xutanerizorener-jusogumurupexo.pdf
    • http://lgndrymvmt.com/uploads/1/3/1/4/131408618/6232579.pdf
    • http://csstrategyforum.com/uploads/1/3/0/7/130738735/pofibukugefoval_xurakaxo_patukexaluvebo.pdf
    • http://itsjuicybih.com/uploads/1/3/0/6/130621912/bafebaxifukis-vofajogegotow.pdf
    • http://reednilandcorner.org/uploads/1/3/1/0/131071308/rijipakag_nimagipaxufuxod.pdf
    • http://michelangelos.org/uploads/1/3/0/2/130288798/zadezuvikibugol-dudoxejepig.pdf
    • http://wedodirectorsandofficersinsurance.com/uploads/1/3/0/7/130775229/zokigaxabasi_tolubazuvipesi.pdf
    • http://danielbogart.com/uploads/1/3/0/5/130543665/rerenifoxazox-feledadezulev-jixori-notuf.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • 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_off000065e2.bin
3ac8421bc98dba4d7affae6adb0e05fb0709f67e543f5b10d5028e2fa4548ec2
pdf-font-stream PDF embedded font (sfnt) at offset 0x65E2 10092 bytes