Malicious PDF — malware analysis report

Static analysis result for SHA-256 72a31ade3aa5b1f0…

MALICIOUS

PDF

52.2 KB Created: 2020-04-21 12:06:55 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f1cb5af37ca4ede8966802d2b14ad99e SHA-1: 49cf34358a18de4ef4c85f1c6ded119de16b0d50 SHA-256: 72a31ade3aa5b1f0335ba103d7bc9f43b1e3c259cae9f9001f41b7d97974219b
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, indicating a link farm or SEO spamming technique. The embedded URL `http://everdayitemtracker.com/uploads/1/3/1/4/131406273/131406273.html#metastatic+breast+cancer+guidelines` and numerous other PDF links suggest the document's primary purpose is to redirect users to potentially malicious content or to manipulate search engine rankings. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://everdayitemtracker.com/uploads/1/3/1/4/131406273/131406273.html#metastatic+breast+cancer+guidelines
    • http://thoserascalfeelings.info/uploads/1/3/0/6/130604493/278de98b3c8c.pdf
    • http://rusticchiclifestyle.com/uploads/1/3/1/3/131398583/mopiviziritoli.pdf
    • http://advantageinsuranceagency.net/uploads/1/3/0/7/130776525/durolojeruwil.pdf
    • http://blufyre.com/uploads/1/3/0/7/130739829/4686301.pdf
    • http://gpmta.org/uploads/1/3/0/2/130287997/notilerazore_kikez_salabin.pdf
    • http://fourwards.net/uploads/1/3/1/3/131380469/d2b4bc19f7be.pdf
    • http://caniblissart.com/uploads/1/3/0/3/130323342/8439598.pdf
    • http://a2z-llc.com/uploads/1/3/0/2/130271209/c19b6577a346.pdf
    • http://rachelsbirthandherbal.com/uploads/1/3/0/6/130604227/notejikibew.pdf
    • http://goldennutsointment.com/uploads/1/3/0/3/130379474/vuluba.pdf
    • http://associate-e.com/uploads/1/3/0/8/130813966/lepigeremewudel.pdf
    • http://dc-nola.com/uploads/1/3/0/6/130604524/newuge_buwozixisirek_dojorovateginof_ziriv.pdf
    • http://onlinelibrary
    • http://www.1056/NEJM200103153441101
    • 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_off0000a1ad.bin
4b002508d9b373f83ab258d220c9b42e098c6688ebcf59ffd245ad20920bb14f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1AD 9472 bytes

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