Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d54f7febb2f69c0…

MALICIOUS

PDF

31.9 KB Created: 2020-05-16 02:07:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 816949d8e7c26be4140390360f42efe1 SHA-1: 5aa9125d4fc7fd0331abfcac777839f75a31559d SHA-256: 8d54f7febb2f69c02f611809cdb90edd0d920f65dc83c700870be66ebe9fa695
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are numerically or generically named, suggesting a link farm or SEO abuse tactic. The document body, though heavily obfuscated, contains references to 'dl size flyer template' and includes URLs that appear to be part of this lure. The primary intent seems to be directing users to these external sites, likely for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://thelostteachings.com/uploads/1/3/0/7/130776149/130776149.html#dl+size+flyer+template PDF link annotation
    • http://kickstartmoto.net/uploads/1/3/0/8/130873895/3795930.pdfIn PDF document text
    • http://asyouwishnw.com/uploads/1/3/1/6/131637780/0a349.pdfIn PDF document text
    • http://texasgaragescreens.com/uploads/1/3/1/0/131071067/a97509997af1ca.pdfIn PDF document text
    • http://windsweptphotography.net/uploads/1/3/0/5/130588830/laruxuf.pdfIn PDF document text
    • http://roldanecheverria.com/uploads/1/3/0/4/130488698/51ced88ca2ace2.pdfIn PDF document text
    • http://redemptionclean.com/uploads/1/3/0/7/130776626/ef01d11c38.pdfIn PDF document text
    • http://tolauncha1000lips.com/uploads/1/3/0/4/130488396/fisofitaterudun.pdfIn PDF document text
    • http://oriflameco.com/uploads/1/3/0/2/130274315/4965016.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000515c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x515C 10468 bytes
SHA-256: e2c3e5689fe0b1cb6cb29efb162cd1267348e46053ed3ae2d04eb29c05df8dc7

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