Malicious PDF — malware analysis report

Static analysis result for SHA-256 08d821d5f1fa005e…

MALICIOUS

PDF

39.7 KB Created: 2020-04-03 02:39:56 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9483d360c38702630ae42d1874706a42 SHA-1: bec27f684df6b69ba63b1526c28438b9806fe10a SHA-256: 08d821d5f1fa005e832a429243827691b67ed5fe76acbe29b6f37ed7fe3f46a5
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, forming a link farm. The document body mentions 'Dell latitude 3550 wifi drivers for windows 7 64 bit', suggesting a lure to trick users into clicking these links. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external URLs indicates a potential distribution or phishing mechanism.

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://fairbankssnowclearing.com/uploads/1/3/1/4/131407625/131407625.html#dell+latitude+3550+wifi+drivers+for+windows+7+64+bit
    • http://southernhorticulturedesign.com/uploads/1/3/0/6/130620730/benezujasal.pdf
    • http://oslouae.com/uploads/1/3/0/6/130639973/7583687.pdf
    • http://launcestonrotarypassport.org/uploads/1/3/0/9/130969689/zufejog_gemaramoduleku_gozol_jusasiti.pdf
    • http://louhauljunkremoval.com/uploads/1/3/0/4/130493714/6cdc73f57.pdf
    • http://adentapoland.com/uploads/1/3/0/5/130540583/cb2218.pdf
    • http://duzaingconstrucciones.com/uploads/1/3/0/5/130550914/32a7e9f13b5d5.pdf
    • http://myteddybearpuppy.com/uploads/1/3/0/9/130969764/3721512.pdf
    • http://alliancemortgageco.com/uploads/1/3/0/5/130540178/5b081d4897.pdf
    • http://isabelreyna.com/uploads/1/3/0/8/130813120/5ce5ce45b443.pdf
    • http://riverlust.com/uploads/1/3/1/4/131438242/4235973.pdf
    • http://turtlespotintw.org/uploads/1/3/0/4/130476548/fosivupalener_lifokabijonaduj_xotefepafiboti_bipijafupef.pdf
    • http://selah-empowers.com/uploads/1/3/0/8/130873867/063b5.pdf
    • http://ladolcevitafarmgirls.com/uploads/1/3/0/5/130547069/tuvibaxowe.pdf
    • http://my-uss.com/uploads/1/3/1/3/131397974/d04959ac1.pdf
    • http://madsvig.net/uploads/1/3/0/3/130313274/8ab99adf794.pdf
    • http://studio62boutique.com/uploads/1/3/0/2/130271179/a96eebf.pdf
    • http://dmbestlife.com/uploads/1/3/0/3/130379111/3323368.pdf
    • http://raybreezeebeats.com/uploads/1/3/0/6/130621019/d1c601f9cd22.pdf
    • http://millennial-media.net/uploads/1/3/1/0/131070539/0a1d03500d6.pdf
    • http://www.christineszinner.com/uploads/1/3/0/6/130604892/jizepigitiv.pdf
    • http://butlermag.com/uploads/1/3/0/6/130604181/6081928.pdf
    • http://ramsenisaac.com/uploads/1/3/0/6/130603955/654a51e8081c8.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_off000071ff.bin
40c055067043ffc3649316cc2fd52145045395e185698bad55151f5b3a21476d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71FF 7836 bytes

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