Malicious PDF — malware analysis report

Static analysis result for SHA-256 752c7cd1b96b2d44…

MALICIOUS

PDF

43.3 KB Created: 2020-03-27 05:40:01 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e7e31f4c9a03c0bf999639ac90e90a71 SHA-1: 97336b700ef8066d7d23244d27a120c58b936544 SHA-256: 752c7cd1b96b2d44555152ef112f1db55c6d5ce9190d9e36ace6330ce7b26f34
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

This PDF document contains a large number of external links, many of which point to other PDFs hosted on similar domains. The heuristic 'PDF_SEO_LINK_FARM' indicates this is a link farm designed to manipulate search engine results. The ML classifier strongly flagged this PDF as malicious. The document body itself is largely unreadable, but the presence of the URL http://murraywhiteley.com/uploads/1/3/0/5/130588688/130588688.html#cuales+son+los+juegos+de+cancha+propia+wikipedia suggests a potential lure.

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://murraywhiteley.com/uploads/1/3/0/5/130588688/130588688.html#cuales+son+los+juegos+de+cancha+propia+wikipedia
    • http://dummydiets.com/uploads/1/3/0/3/130323224/8336895.pdf
    • http://nuthoppers.com/uploads/1/3/0/8/130873918/gixowowapema.pdf
    • http://katyspratt.com/uploads/1/3/0/3/130324027/tivedubesizon.pdf
    • http://godsfamilygodsearth.net/uploads/1/3/0/2/130271237/9495481.pdf
    • http://justsofreshsoclean.com/uploads/1/3/0/2/130272295/20c75f559b.pdf
    • http://glassworx.info/uploads/1/3/0/6/130605165/vuraw_burajebarasonid_lixosovubebu_tufixadan.pdf
    • http://realitytvchannel.com/uploads/1/3/0/6/130603931/podovijajijew.pdf
    • http://urbanmealz.com/uploads/1/3/0/5/130545097/jarazabor.pdf
    • http://organicmatchmaker.com/uploads/1/3/0/5/130541623/6267265.pdf
    • http://gainesgrips.com/uploads/1/3/0/5/130550683/pategejenafag-peganisobuxiwuk-dapizimofax-xipoxarebi.pdf
    • http://ndjapanese.com/uploads/1/3/0/5/130545396/a185bc5.pdf
    • http://saveyourspecs.com/uploads/1/3/0/5/130588344/2a8f6781fb.pdf
    • http://www.elliottestes2017.com/uploads/1/3/0/5/130588366/xawumuxodenagen.pdf
    • http://dreamcatchergozo.com/uploads/1/3/0/6/130604874/031c0.pdf
    • http://fourseasonslawn.ca/uploads/1/3/0/8/130813141/5909d6e494b1272.pdf
    • http://hawaiijudacia.com/uploads/1/3/0/7/130739595/571524.pdf
    • http://constelmag.com/uploads/1/3/0/6/130620536/kubevakow.pdf
    • http://www.livingwatertattoo.com/uploads/1/3/0/6/130621903/0e1d7406fac9.pdf
    • http://pediatricmcqs.com/uploads/1/3/0/7/130739333/fojoba-tozojuritaw-xazifulav-sadur.pdf
    • http://theatrebornbetween.com/uploads/1/3/0/6/130604511/1017570.pdf
    • http://cathybetoin.com/uploads/1/3/0/5/130551656/zojulumunojev.pdf
    • http://lesviviersdelocker.com/uploads/1/3/0/7/130776525/filawakefowenal.pdf
    • http://www.throughadream.com/uploads/1/3/0/8/130874473/repibakazin_bekirabisojizav_rajofotudorob_galiseg.pdf
    • http://www.throughadream.com/uploads/1/3/0/8/130874473/repibakazin_bekirabisojizav_rajofotudorob_
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007383.bin
616862dc9a617f62be73918990f5d428244883cd3ff5e48aa10dda8536b69adc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7383 8704 bytes
font_01_sfnt_off000092f9.bin
66185990080ed1ac3e4375c4abfc252c5fc1d4cb916291cb438769cc74441e23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92F9 2832 bytes

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