Malicious PDF — malware analysis report

Static analysis result for SHA-256 702161decd81b070…

MALICIOUS

PDF

75.8 KB Created: 2020-03-22 10:55:59 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 4f5f86ea40d33eb4dcb5a32115bb6018 SHA-1: bdc3975736426ded97f0b465439b58a23bf92188 SHA-256: 702161decd81b070f2e5e2f521531c047635f9ca63e8792e00246afa9c36a77a
116 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, a common tactic for phishing or directing users to malicious sites. The 'SE_CALLBACK_LURE' heuristic suggests a pretext for social engineering, likely to trick users into clicking these links. The ML classifier strongly indicates malicious intent, and the sheer volume of external links points towards a link farm or SEO spamming technique.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://alexascleaningservices.org/uploads/1/3/1/1/131163878/131163878.html#used+manual+volkswagen+jetta+for+sale
    • http://spicestrips.com/uploads/1/3/0/4/130492963/zubozag-wojasebo-sevodu.pdf
    • http://lucjackman.com/uploads/1/3/0/2/130272443/5abe1ec.pdf
    • http://www.2ndstorytextileworkshop.com.au/uploads/1/3/0/5/130588581/funuvupimikofe-pijopepukuj-gusikuxuwomug.pdf
    • http://card-on-blue.com/uploads/1/3/0/6/130604887/nofezufexoloroz_senijanazix_nitujok.pdf
    • http://studio1999.shop/uploads/1/3/0/3/130323478/jatimax.pdf
    • http://pricedestroyer.com/uploads/1/3/0/4/130488701/mesexe.pdf
    • http://www.thetaxclinicofbaltimore.com/uploads/1/3/0/5/130547999/mapezuxoza.pdf
    • http://coreconsulting.com/uploads/1/3/0/6/130604338/457b949d6d.pdf
    • http://esraadesigner.com/uploads/1/3/0/6/130604973/sosakenite-wizidura-xajetim.pdf
    • http://cpanel.aztralabs.space/uploads/1/3/0/5/130543364/bufuzuwuge.pdf
    • http://aqzsystems.biz/uploads/1/3/0/3/130379841/juwabaxopudu-xonajonik-xibanubukibag.pdf
    • http://regrettheerror.net/uploads/1/3/0/7/130738576/9b26c.pdf
    • http://sjnbasketball.org/uploads/1/3/0/6/130605133/nagijutotajale-wenofolemub-wifapesopa.pdf
    • http://hilltopbakes.com/uploads/1/3/0/6/130621865/6854279.pdf
    • http://tortillaveloz.com/uploads/1/3/0/6/130639508/loxelilineme_bisen.pdf
    • http://clubxboxpodcast.com/uploads/1/3/0/6/130604803/4359470.pdf
    • http://westportbiblechurch.org/uploads/1/3/0/5/130551231/466d527be.pdf
    • http://www.jscsnationwidesalonfitters.co.uk/uploads/1/3/0/2/130270963/bizevejupowinu.pdf
    • http://ladybugscrubhats.com/uploads/1/3/0/8/130874063/woxifibudixoxu.pdf
    • http://kanon.photos/uploads/1/3/0/5/130551248/2274740.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_off0001019e.bin
1983afb813b12595742685114b837210e4032fae95cf7e4c02ce257869bdb886		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1019E 8240 bytes

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