Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a6b01b67cdd2441…

MALICIOUS

PDF

50.7 KB Created: 2020-03-21 11:20:48 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2a6b1c974ee1790383bb505be4b83b18 SHA-1: 10c571ecd06bd1979beeb49b435817104b7640ca SHA-256: 1a6b01b67cdd2441071ee0292f272f0f14a4072b6362090a482a70c34919538c
96 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO spam operation. The document body, though partially corrupted, includes references to 'Adobe premiere tutorial videos' and the wkhtmltopdf generator, indicating a lure to external content. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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://brandstormpromotions.net/uploads/1/3/0/5/130544968/130544968.html#adobe+premiere+tutorial+videos
    • http://kundalinidancealchemy.com/uploads/1/3/0/5/130540155/2512885.pdf
    • http://mta-sts.mx.wendellmillspiano.com/uploads/1/3/0/6/130604314/kefefotufemevep_gabuzugexu_nifoxilad_suruvisi.pdf
    • http://weirdkaraoke.com/uploads/1/3/0/8/130873851/wimemiso.pdf
    • http://dup-online.org/uploads/1/3/0/5/130590282/zoziwesikulezujojolo.pdf
    • http://resolvecustomer-issueactivity.com/uploads/1/3/0/4/130483418/fesirok_gesirujibugefoz_fulawufirepejig_faxemuvatu.pdf
    • http://mail.abovethecoals.com/uploads/1/3/0/4/130489070/witar_dotepuxag.pdf
    • http://www.camphopeless.io/uploads/1/3/0/3/130313390/xusozopuwokin.pdf
    • http://www.atthagastofa.is/uploads/1/3/0/3/130323110/b23d0456e73c5b.pdf
    • http://otelhosp.com/uploads/1/3/0/2/130274322/bakinipabemaxaw.pdf
    • http://nmnawgj.com/uploads/1/3/0/7/130775762/sonuga.pdf
    • http://curvybridesma.com/uploads/1/3/0/3/130323232/zupuzumutezewepe.pdf
    • http://webmail.gammaxiques.org/uploads/1/3/0/4/130435583/1166834.pdf
    • http://webmail.pitchforkpreserves.com/uploads/1/3/0/7/130739705/repibitivilapig_mubikesigel.pdf
    • http://bandpetbrasil.com/uploads/1/3/0/5/130539130/fe5f91d.pdf
    • http://befree-rv.com/uploads/1/3/0/5/130543038/pezino_xiduw_kevopira_motoruroken.pdf
    • http://mylifeinconchas.com/uploads/1/3/1/0/131071095/6199313.pdf
    • http://nawwarshukriahali.com/uploads/1/3/0/7/130775833/9782509.pdf
    • http://switchingtooboe.com/uploads/1/3/0/6/130639950/rimab-jarasagewomutu-naxapamonobaw-minop.pdf
    • http://mail.vacationhome4u.com/uploads/1/3/0/8/130814238/4619391.pdf
    • http://therightdoor.com/uploads/1/3/0/2/130289724/24361d2c50cf.pdf
    • http://www.casablancaarts.com/uploads/1/3/0/4/130476632/1279199.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_off00009faa.bin
00f47cc724209d80db7c3c2737daf157d2ccd56ac61c1a493e5a3e77a9404146		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FAA 7480 bytes

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