Malicious PDF — malware analysis report

Static analysis result for SHA-256 5318e36473388e96…

MALICIOUS

PDF

42.0 KB Created: 2020-03-29 11:42:30 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2374287f3a2528598575e4775e3d6a33 SHA-1: 022f187cfbfd29adb57525ddc6555176206aa1d8 SHA-256: 5318e36473388e96c24702f2abb50b0f80ff01e93afeebfa2e020704ef5715a9
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body, though partially corrupted, contains text related to geometric figures and references wkhtmltopdf, suggesting a lure to disguise the malicious nature of the links. The primary intent appears to be directing users to a link farm for SEO manipulation or to host further malicious content.

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://74-123-79-231.mgwnet.com/uploads/1/3/0/6/130605306/130605306.html#figuras+geometricas+semejantes+y+congruentes
    • http://djdownpat.net/uploads/1/3/0/7/130775154/b6966b.pdf
    • http://katobikewalk.com/uploads/1/3/0/9/130969682/62e8fc9fbec1a32.pdf
    • http://blocktekcapital.com/uploads/1/3/0/7/130739341/zupopi_xilop_vivofimup.pdf
    • http://northwestembroidery.net/uploads/1/3/0/3/130379210/wuvolijerijipalimi.pdf
    • http://ecotots.ie/uploads/1/3/1/4/131406092/sikidetoxiludosos.pdf
    • http://nicholsonsbar.com/uploads/1/3/0/6/130621385/496a73ddc8cc7.pdf
    • http://makingmoneyandmealbyfive.com/uploads/1/3/0/7/130776152/1180681.pdf
    • http://sikhcouncilbirmingham.org/uploads/1/3/0/2/130271126/zivibaxerixixatav.pdf
    • http://mathermountainparty.com/uploads/1/3/0/5/130588845/sapatekekusu_barufifexa_tawipiginosove.pdf
    • http://executivefunctionactivities.com/uploads/1/3/0/8/130874668/bb627af.pdf
    • http://stemhighschoolchattanooga.com/uploads/1/3/0/3/130313021/niralekamesasepaxi.pdf
    • http://kapserenite.com/uploads/1/3/0/7/130776249/8194196.pdf
    • http://kamicogroup.com/uploads/1/3/0/6/130621775/lanisutevodif.pdf
    • http://vulnerablystripped.org/uploads/1/3/0/6/130620834/goseve.pdf
    • http://slotskoncert.com/uploads/1/3/1/3/131383207/jarifepox.pdf
    • http://foxhomeinspectionllc.net/uploads/1/3/1/1/131164452/05b0432f6cfc5fe.pdf
    • http://theofficefinancing.com/uploads/1/3/0/6/130604882/6936741.pdf
    • http://theunfamiliarpath.com/uploads/1/3/1/0/131070375/giretuvafibe-fejuvi-luxuxereba-lofexad.pdf
    • http://ineedabookkeeper.co/uploads/1/3/0/5/130590243/e16e12edaf.pdf
    • http://thoughtandbelief.com/uploads/1/3/0/5/130590435/7094356.pdf
    • http://idare2dress.com/uploads/1/3/0/7/130739824/5f3b19b9e.pdf
    • http://eyemagine.media/uploads/1/3/0/7/130775115/zewoz_nanomusipoloze.pdf
    • http://capecoralmobileautorepair.com/uploads/1/3/0/5/130541023/7010270.pdf
    • http://mthps.org/uploads/1/3/0/5/130590663/9129472.pdf
    • http://capecoralmobileautorepair.com/uploads/1/3/0/5/1305410
    • 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_off00007a74.bin
9fe916149b3e653b0e02f2568690bca19598281e46a614927f54f8edfa07f3b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A74 8752 bytes

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