Malicious PDF — malware analysis report

Static analysis result for SHA-256 7af054fdf2336378…

MALICIOUS

PDF

42.5 KB Created: 2020-03-20 03:40:49 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 67185498a7de04e39f3892609d99a876 SHA-1: 2ed17137fb3a8b2b21870647d91fa60aaf1964ce SHA-256: 7af054fdf23363788b12a9cdc547e04aff41bd436d17c6e22a23011f91fc65e6
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified as a link farm, likely for SEO manipulation or to distribute further malicious content. The document's content is presented as an IQ test, a common lure for phishing or malware distribution. The ML classifier strongly indicated maliciousness, supporting the heuristic findings.

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://optikdworschak.at/uploads/1/3/0/5/130541137/130541137.html#mensa+iq+practice+test+free
    • http://esctfrancais9e.com/uploads/1/3/0/7/130775763/58981fe0.pdf
    • http://rubylencicki.com/uploads/1/3/0/6/130640090/1546702.pdf
    • http://northplainfieldpark.com/uploads/1/3/0/5/130542780/laworugi_wolegaxamixijed_xajunanasekum.pdf
    • http://occiv.com/uploads/1/3/0/6/130605125/4389819.pdf
    • http://www.theworldofboden.com/uploads/1/3/0/5/130539373/mivuv_vefebatetatano_dusawegimin.pdf
    • http://internetradiochat.com/uploads/1/3/0/2/130271185/dajenezexapo.pdf
    • http://specialtygifts2go.com/uploads/1/3/0/8/130813646/xakom-jazivejinowi-gevosavolefafa-kenimoj.pdf
    • http://webdisk.karerotary.org/uploads/1/3/0/7/130738921/c1b03192b05659.pdf
    • http://webdisk.mobiledetailinglasvegas.com/uploads/1/3/0/4/130483591/05c9faae2840cf7.pdf
    • http://portabletoiletsmichigan.com/uploads/1/3/0/6/130604176/7b9f009f4b9.pdf
    • http://bangkokpropertymanagement.com/uploads/1/3/0/5/130588199/e91bcb8fb.pdf
    • http://testing.mainstrasse.org/uploads/1/3/0/2/130289371/dixokutotu-lotimofaxakali.pdf
    • http://unlocked.live/uploads/1/3/0/4/130483542/dumulijako.pdf
    • http://backseatcharger.com/uploads/1/3/0/7/130776487/2639197.pdf
    • http://autodiscover.inapeartree.co.nz/uploads/1/3/0/5/130589312/labowepe_pudivebevi_bedoximunu_jetej.pdf
    • http://prestineepoxycoatings.com/uploads/1/3/0/2/130273791/wefepegewugujozez.pdf
    • http://coralgablescrimewatch.org/uploads/1/3/0/6/130620888/797d1b1d69e01b.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_off00007b5f.bin
e09024f4db464a8d964293fcbe01ece89ca05d7dcaf03b2c49961f5d68836746		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B5F 8380 bytes

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