Malicious PDF — malware analysis report

Static analysis result for SHA-256 721523183a883b1a…

MALICIOUS

PDF

43.9 KB Created: 2020-03-25 13:26:55 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 7641f7c4dd130910b30c47b3fdd7c43e SHA-1: f220ffb30560bfb58cce1717d8d9b252a9cc7e2d SHA-256: 721523183a883b1ac693b852df393c6708544015ceeb139369ed5946dff2f7fc
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

The PDF contains a large number of external links, flagged as a link farm, suggesting a non-standard purpose beyond document delivery. The ML classifier strongly indicates maliciousness. The embedded content, though heavily obfuscated, contains URLs that are likely part of this link farm, potentially leading to further malicious content or SEO abuse.

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://andmerchant.org/uploads/1/3/0/5/130590310/130590310.html#21+day+flat+belly+fix+tea+recipe+reviews
    • http://achintconsultinginc.com/uploads/1/3/0/2/130291471/5979364.pdf
    • http://leanadvocacy.org/uploads/1/3/0/2/130272440/4722850.pdf
    • http://theatre-wizard.com/uploads/1/3/0/5/130588987/7838385.pdf
    • http://yournextheadquarters.com/uploads/1/3/0/5/130539366/guzig-jisepanelalifo-wofil-kunemef.pdf
    • http://callsherselfafeminist.com/uploads/1/3/0/4/130436018/8583758.pdf
    • http://firstcloudsecurity.com/uploads/1/3/0/5/130546645/8581232.pdf
    • http://frankieshin.net/uploads/1/3/0/7/130739129/vorewagej.pdf
    • http://bodytransformationhabits.com/uploads/1/3/0/3/130379634/3246277.pdf
    • http://pauhanahawaii.com/uploads/1/3/0/3/130379653/zixotures.pdf
    • http://isometrictension.com/uploads/1/3/0/5/130551185/duwifesuni-moromak.pdf
    • http://hostmaster.weliketosmoothit.co.uk/uploads/1/3/0/4/130435582/d4a778af6a.pdf
    • http://bietherapy.com/uploads/1/3/0/6/130640139/nedowitesum.pdf
    • http://alfordtech.com/uploads/1/3/0/5/130589014/a3c875c2b2c04f.pdf
    • http://khunmaewonline.com/uploads/1/3/0/4/130435805/folakuzizi_xefivopirosisi_wiburigu_merolezale.pdf
    • http://bwassociatesltd.com/uploads/1/3/0/8/130874163/5948578.pdf
    • http://wildbeastfeast.com/uploads/1/3/0/5/130589244/7669516.pdf
    • http://nspropertymanagement.com/uploads/1/3/0/8/130873975/dc6ca4982ef.pdf
    • http://motionfuels-arkansas.com/uploads/1/3/0/6/130621882/refozubevinuro.pdf
    • http://finegerman.com/uploads/1/3/0/6/130639037/2309956.pdf
    • http://apartmentlocatorshomefinding.com/uploads/1/3/0/2/130291689/sazujun.pdf
    • http://www.shannonstravelphotos.com/uploads/1/3/0/5/130539449/9e584771578.pdf
    • http://jbelloli.com/uploads/1/3/0/3/130313436/155372.pdf
    • http://illuminated-living.com/uploads/1/3/0/4/130483492/jimemetoj_talemoditu.pdf
    • http://happyandlearningcdcllc.org/uploads/1/3/0/6/130620594/werenugegaxug.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_off0000833c.bin
afcef87e0a2dc80010227af7bf435d48e3ac4fe1c7b3a9b76c80b7eb65d1241f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x833C 7748 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.