Malicious PDF — malware analysis report

Static analysis result for SHA-256 3530c2107476abe4…

MALICIOUS

PDF

44.8 KB Created: 2020-05-04 04:53:29 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c59e6a275ff65f2763adbec33abf0c46 SHA-1: 82c8abfeeb375e53cf7ab8abde23b26a8de8c024 SHA-256: 3530c2107476abe4961100114faf4db7b5f6de21cdc720218236da14bcaba902
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm. The document body, though obfuscated, contains text related to 'breathing exercises' and references the wkhtmltopdf tool, suggesting a lure to disguise the malicious intent. The primary goal appears to be driving traffic to a network of websites, rather than delivering a direct payload.

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://bringinghopetotheheart.org/uploads/1/3/0/2/130271073/130271073.html#abdominal+breathing+exercises+pdf
    • http://beautyandtheminks.com/uploads/1/3/0/8/130815228/begosidaj-xunakuka-kivatesatemedi.pdf
    • http://aktivmassageterapi.se/uploads/1/3/0/3/130379389/fumip.pdf
    • http://littypartyinabox.com/uploads/1/3/1/4/131437548/lagelisunopoba.pdf
    • http://kundaliniyogainbali.com/uploads/1/3/0/2/130272372/rejijig-wozubojitudin-zilosivomivo-wabug.pdf
    • http://libertyearlyeducationcenter.com/uploads/1/3/1/3/131383592/b88a91.pdf
    • http://byirenehernandez.com/uploads/1/3/1/1/131164204/galetuk.pdf
    • http://browncf.com/uploads/1/3/1/3/131398356/wofuwavitewizokob.pdf
    • http://homelessrefugesupport.org/uploads/1/3/0/8/130813401/tapudavibo-xagubajejore-wugafofamupama-rabigedowegero.pdf
    • http://backpackbuddiesofpoplarville.com/uploads/1/3/0/2/130287547/jagepesizebokedi.pdf
    • http://eca-engineering.com/uploads/1/3/1/4/131437138/nemuwadijunifuwor.pdf
    • http://myshoedestination.com/uploads/1/3/0/2/130272458/bakud-bafunowa-kebumiwezogizo-mujuz.pdf
    • http://reputationthompson.com/uploads/1/3/0/6/130605133/xurotomuwamiga.pdf
    • http://feelsick.net/uploads/1/3/1/3/131398489/3449746.pdf
    • http://sitascircus.com/uploads/1/3/0/8/130874539/b8c7e.pdf
    • http://intheatreland.com/uploads/1/3/0/6/130639275/2371164.pdf
    • http://konnen.org/uploads/1/3/1/4/131406934/4810721.pdf
    • http://kameronchristian.com/uploads/1/3/0/2/130287407/3743337.pdf
    • http://onshoresurfshops.com/uploads/1/3/1/3/131380944/sodufizuripewegixu.pdf
    • http://galriffictv.net/uploads/1/3/0/7/130739112/7287644.pdf
    • http://mymaxwax.com/uploads/1/3/0/4/130483123/nesatosivemir.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • 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_off000084f1.bin
24a6dec2ef2d122ceed3da813a1b63e441207b94f63e70ae0a919df60e88d077
pdf-font-stream PDF embedded font (sfnt) at offset 0x84F1 10392 bytes