Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e45ed15c53884d8…

MALICIOUS

PDF

38.7 KB Created: 2020-03-21 16:33:34 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 17be3dfdcab4bef5b03e22bf568ac70a SHA-1: 7cd48d5652cfbc794bb499246d443759746e7f67 SHA-256: 1e45ed15c53884d8884ec216c21eeb430d80f0660b700f2347c5f3620c3f5a7d
94 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO spam campaign. The document body, though partially corrupted, contains text related to 'modern biology chapter 8 section 2 review answers' and references the wkhtmltopdf tool, indicating a deceptive lure. The primary intent appears to be directing users to a large number of external PDF documents hosted on various domains.

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://threehillsagritourism.com/uploads/1/3/0/7/130739491/130739491.html#modern+biology+chapter+8+section+2+review+answers
    • http://www.redpocket.com.au/uploads/1/3/0/6/130639528/f1dae4ce3c9b.pdf
    • http://siouxcenterchiropractor.com/uploads/1/3/0/4/130483409/1508196.pdf
    • http://coastalconciergewellness.com/uploads/1/3/0/4/130483817/zipujanaxunulolazu.pdf
    • http://theorderoftheoak.org/uploads/1/3/0/3/130379316/99a91.pdf
    • http://animalstuff.net/uploads/1/3/0/6/130603977/16b2f0383708.pdf
    • http://lunchbox-gourmet.com/uploads/1/3/0/4/130483656/17f88.pdf
    • http://eyelashesandmorebyerin.com/uploads/1/3/0/7/130776043/8329305.pdf
    • http://mrhodesconsulting.com/uploads/1/3/0/7/130738752/popitumejewewapa.pdf
    • http://rethreadclothingco.com/uploads/1/3/1/1/131164446/wigomepafikopav.pdf
    • http://rescuetools.ca/uploads/1/3/0/4/130477363/mibabufoduz-sagekotulovil-galijub.pdf
    • http://hikingkosovo.com/uploads/1/3/0/7/130776474/metopaz.pdf
    • http://realestatelearningnetwork.info/uploads/1/3/0/6/130639984/lipetudurosejafa.pdf
    • http://nordicswimming.org/uploads/1/3/0/5/130588618/59c2130.pdf
    • http://livemagicentertainment.com/uploads/1/3/0/6/130604639/fiwufezowubajen.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_off00007099.bin
d2eb6f9377a97a718531905df32995fb09da7cae7c16cc9b72bfeb8ed54f1ad6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7099 7348 bytes

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