Malicious PDF — malware analysis report

Static analysis result for SHA-256 c26b19c7f3961074…

MALICIOUS

PDF

39.4 KB Created: 2020-05-13 23:42:09 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1584536326dbb25c04e07934ce6cbbe2 SHA-1: 22d218f313422476373380f13a9193cac56639c4 SHA-256: c26b19c7f3961074c3527c07425cc15cbb01a9b53bf4cf9ae5f841892ff5e90d
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, many with numeric slugs, indicating a link farm designed to host malicious content. The document body presents a deceptive 'Axis direct cdsl account closure form' lure. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external URLs suggests a phishing or drive-by download attempt.

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://50southsixthstreet.com/uploads/1/3/1/4/131453329/131453329.html#axis+direct+cdsl+account+closure+form
    • http://confidentpassionatewoman.com/uploads/1/3/1/0/131071210/vunuzoposexuzuveza.pdf
    • http://maxontowerhairsalon.com/uploads/1/3/0/4/130435877/e3d37d65b.pdf
    • http://bossinvogue.com/uploads/1/3/1/1/131164573/kukazuwizawon-pimen-domimexeva-binajadufugo.pdf
    • http://coastaldetectives.com/uploads/1/3/0/2/130272330/nufajuwinaju.pdf
    • http://backporchpetsalon.com/uploads/1/3/0/6/130604820/1109a2.pdf
    • http://rctaxconsulting.net/uploads/1/3/0/9/130969700/4383332.pdf
    • http://myparadisepoint.com/uploads/1/3/0/6/130621310/vosagunimega.pdf
    • http://affordablecommercialroofing.biz/uploads/1/3/0/4/130476541/newijilaxep.pdf
    • http://hrpropertyrestoration.com/uploads/1/3/1/4/131438471/13648.pdf
    • http://how2managetime.com/uploads/1/3/0/3/130323510/vanesuxefer.pdf
    • http://dancbarber.com/uploads/1/3/0/7/130775672/fugamenizetok.pdf
    • http://winterlinestaging.com/uploads/1/3/0/2/130289504/0ba1ecf8bf.pdf
    • http://smaholidayrentals.com/uploads/1/3/1/4/131406985/4179900.pdf
    • http://godofdreams.com/uploads/1/3/0/2/130272381/lozefit.pdf
    • http://schoolhousepreparatory.com/uploads/1/3/0/7/130776394/fomuturinoxaza.pdf
    • http://momasol.com/uploads/1/3/0/7/130739560/b4814a5.pdf
    • http://neurosignalslab.net/uploads/1/3/1/4/131438786/sodojopa.pdf
    • http://myaccnfx649.com/uploads/1/3/1/6/131637870/bipibipopadepif.pdf
    • http://mumsbykandm.com/uploads/1/3/1/8/131856959/radibokan.pdf
    • http://wildhillsfarm.com/uploads/1/3/0/2/130287503/wabefaluxakekinok.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_off00006e69.bin
81c69fef22cb9c75e1582d0408878252c0bf57de27ff74b2db4bd188cd2efebf
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E69 10208 bytes