Malicious PDF — malware analysis report

Static analysis result for SHA-256 861e87f8ce97f453…

MALICIOUS

PDF

40.5 KB Created: 2020-03-07 20:49:29 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e8a7a15d971d8cfd74f1e0e7bfa51678 SHA-1: 00a71c8d661d1b3b8c61cdb5004e66df6af93e88 SHA-256: 861e87f8ce97f4533c51650b23e7b5389cf7391ca9cc9a1356416a8f75160522
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by an ML classifier and contains a large number of external links, indicating it is part of a link farm. The document body, though obfuscated, contains text related to 'Airtel dth recharge pack rajasthan' and embedded URLs, suggesting a lure to redirect users to potentially malicious content. The presence of numerous external links points towards a tactic to distribute traffic or host malicious content across multiple domains.

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://74-123-76-212.mgwnet.com/uploads/1/3/0/5/130541552/130541552.html#airtel+dth+recharge+pack+rajasthan
    • http://bethanyschooljat.org/uploads/1/3/0/8/130874043/5cf33.pdf
    • http://amongotherrunners.com/uploads/1/3/0/5/130550696/9031846.pdf
    • http://songarts.com/uploads/1/3/0/6/130604791/dokaxusodefebi.pdf
    • http://branchettastreasures.com/uploads/1/3/0/3/130379482/e9818.pdf
    • http://healingfromcenter.com/uploads/1/3/0/6/130621509/9e283e52.pdf
    • http://lastressirenas.com/uploads/1/3/0/4/130483132/c230ae3d28f2694.pdf
    • http://ryanmast.org/uploads/1/3/0/7/130739742/tiwomuv.pdf
    • http://upwholesaleflooring.com/uploads/1/3/0/5/130545194/e31b5.pdf
    • http://www.rare-earth-hardwoods.net/uploads/1/3/0/8/130814226/4643212.pdf
    • http://mail.bemisfarmsnursery.com/uploads/1/3/0/5/130589044/dewaxokepisabuzuxili.pdf
    • http://everydaycontemplative.ca/uploads/1/3/0/9/130969279/43903867f5d19.pdf
    • http://psychphd.com/uploads/1/3/0/6/130604758/pesegad_voben_janud.pdf
    • http://thecoastshop.com/uploads/1/3/0/8/130813982/98fa7f0.pdf
    • http://triathlonrankings.com/uploads/1/3/0/2/130291471/de9a491.pdf
    • http://saddlepaddle.co.uk/uploads/1/3/0/5/130543190/famaxisenezanosekofe.pdf
    • http://autodiscover.bistroelan.com/uploads/1/3/0/5/130588222/xanemeriroj.pdf
    • http://statewidelandsales.com/uploads/1/3/0/3/130313422/6cf4c8a846.pdf
    • http://www.odysseycounselingandwellness.com/uploads/1/3/0/5/130551477/e5d6598.pdf
    • http://soxpal.com/uploads/1/3/0/5/130547689/mibigi-juwexuwovak.pdf
    • http://brightbeauty.org/uploads/1/3/0/2/130287878/gazetoloded-vowise.pdf
    • http://nworegon.net/uploads/1/3/0/5/130588396/784795.pdf
    • http://mta-sts.mx.adamflemmingdesign.com/uploads/1/3/0/6/130603835/89d0b.pdf
    • http://jobsholic.com/uploads/1/3/0/5/130589430/8066299.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_off000073a4.bin
899017f7ef8910ef1ce63bcd4e7cb365fb411d10d441f243206c41ebe48dd68c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73A4 8012 bytes

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