Malicious PDF — malware analysis report

Static analysis result for SHA-256 44c89b524f00a3c8…

MALICIOUS

PDF

41.9 KB Created: 2020-03-20 09:01:41 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 080162b2997041f4191408ceba420e30 SHA-1: 05a236ec850ab4a6010c9ef1c781ae15616dccb4 SHA-256: 44c89b524f00a3c8c6907ac7be173ad0cf66e7366c4daf4e37eddb35cd0f01fd
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, many of which point to other PDF files with numeric slugs, indicative of a link farm or SEO poisoning tactic. The document body, though heavily obfuscated, contains a URL that appears to be part of this scheme. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious link distribution attack.

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://saranlpcoach.com/uploads/1/3/0/7/130740522/130740522.html#rock+climbers+training+manual+forum
    • http://synergybusinessware.com/uploads/1/3/0/3/130324207/werepuz.pdf
    • http://saltwateraloha.com/uploads/1/3/0/5/130590111/b55a139eaf460.pdf
    • http://rawasmedical.com/uploads/1/3/0/3/130323491/gedozegoxexid_lawer.pdf
    • http://startupentrepreneur.co.uk/uploads/1/3/0/4/130435638/9942cd0.pdf
    • http://novelsenseofplace.com/uploads/1/3/0/5/130588345/c9e8f21b7f14ef7.pdf
    • http://springshine.us/uploads/1/3/0/4/130488251/xuvepi.pdf
    • http://proactivebirthmovement.org/uploads/1/3/0/2/130272853/baxomuboju.pdf
    • http://mirrorsofgodslove.org/uploads/1/3/0/7/130739817/1034598.pdf
    • http://hauntednorthwest.com/uploads/1/3/0/7/130776571/kaxuresilarato.pdf
    • http://makahisland.com/uploads/1/3/0/6/130605432/xebom.pdf
    • http://www.danielatorrez.com/uploads/1/3/0/9/130969375/biwanesug.pdf
    • http://bergen-city.com/uploads/1/3/0/5/130551745/tupegipurul.pdf
    • http://henklaroi.nl/uploads/1/3/0/6/130604243/bimimomakoseza.pdf
    • http://sqlthemovie.com/uploads/1/3/0/6/130605448/7da18ad7a8f.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_off00007a75.bin
4d7341cdc9e8754cf6408ed5011b518f414f01168a739530a4486ec097290ef9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A75 8312 bytes

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