Malicious PDF — malware analysis report

Static analysis result for SHA-256 f968df87752fa3ac…

MALICIOUS

PDF

46.2 KB Created: 2020-03-08 11:59:54 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 393e4c514be734f4e95c8f2ce4ceca26 SHA-1: 6fdc6d8e0097ab38bbb39a29bf99de8b347d797c SHA-256: f968df87752fa3ac8b9cd233178106783c93dde40d7b316e6e605f4363c79169
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm. The primary heuristic 'PDF_SEO_LINK_FARM' indicates that the PDF is designed to host numerous links to other PDF documents, likely for SEO manipulation or to distribute further malicious content. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text and URLs, reinforcing the link farm nature of the document.

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://iyjpb.bpmtc.com/uploads/1/3/0/6/130639956/130639956.html#sharp+pains+lower+belly+37+weeks+pregnant
    • http://hostmaster.vozsmart.com/uploads/1/3/1/0/131070918/nujijirusefosikabu.pdf
    • http://alivewithautism.org/uploads/1/3/0/6/130605325/giluwusa.pdf
    • http://newpublicnetwork.net/uploads/1/3/0/5/130540453/doxufeziba_jokemefezu_tixoxerokepil_bepelukoxipa.pdf
    • http://movetocharlottecounty.com/uploads/1/3/0/2/130291536/38bc6.pdf
    • http://glendorainhomecare.com/uploads/1/3/0/6/130603764/sugekanup.pdf
    • http://newgrad.co.uk/uploads/1/3/0/6/130605230/0e0fc.pdf
    • http://compareemergencyproducts.com/uploads/1/3/0/3/130379051/sepikesaponewo-xaboli-zeresigefe.pdf
    • http://astridbadell.com/uploads/1/3/0/7/130776787/kotitiwi_debutufazopilu_bulol_kasekomusati.pdf
    • http://newwinechurchpoteet.com/uploads/1/3/0/5/130539763/5788899.pdf
    • http://archidemus.com/uploads/1/3/0/6/130640025/rovawo_vulefavezav_kaduxawirew_wuzakitero.pdf
    • http://mail.iancasiple-rmt.com/uploads/1/3/0/4/130476083/wusox.pdf
    • http://nu9empire.com/uploads/1/3/0/6/130620387/5172a8.pdf
    • http://untappededtech.com/uploads/1/3/0/6/130605122/poxixiditenan.pdf
    • http://bojemef.com/uploads/1/3/0/4/130477719/3180901.pdf
    • http://ilocalsmart.com/uploads/1/3/0/7/130740191/cee26e8c9b9ca.pdf
    • http://www.oneagleswingsbiz.com/uploads/1/3/0/7/130775714/jaluxam.pdf
    • http://monkeesconcerts.com/uploads/1/3/0/5/130538922/864477.pdf
    • http://hiphipreviews.com/uploads/1/3/0/2/130270956/6729370.pdf
    • http://conscience-ai.com/uploads/1/3/0/6/130621786/pisabunilifililar.pdf
    • http://www.latewhistleproductions.com/uploads/1/3/0/6/130604336/7a81b74cc.pdf
    • http://hanasandpaone.com/uploads/1/3/0/4/130435791/2730559.pdf
    • http://morrowtimes.com/uploads/1/3/0/3/130323097/roseza.pdf
    • http://www.lonedaisyintimates.com/uploads/1/3/0/6/130639784/lajodatateruxogitunu.pdf
    • http://www.moorishmack.org/uploads/1/3/0/8/130813042/sinumisegorujilemijo.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_off00008cd5.bin
3d0f24f5eca9dea7b9353913d28e886e1347cf44948baec329726d08ba7a1d23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD5 7716 bytes

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