Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f2f750774435364…

MALICIOUS

PDF

38.6 KB Created: 2020-03-21 11:59:38 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 25d3811279bfae5b41833556e6e2a354 SHA-1: 028dfc7bedfc1265a4c7f7fe93fa07b003bf84b3 SHA-256: 9f2f7507744353648b5edbd1b405a7f516094adf4595edda0d9532958e230d1b
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links pointing to other PDF files hosted on various domains. This pattern is indicative of SEO poisoning or a link farm designed to drive traffic to potentially malicious or low-quality content. No scripts were extracted, and the document body is heavily obfuscated, making a precise determination of the ultimate goal difficult. However, the sheer volume of external links strongly suggests a malicious intent to manipulate search engine results or redirect users.

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://pathwaysto.org/uploads/1/3/0/5/130538836/130538836.html#procesos+de+soldadura+mig+mag
    • http://cpanel.cbddepotshop.com/uploads/1/3/0/8/130874384/442958.pdf
    • http://thefashionablefarmgirl.com/uploads/1/3/0/5/130590474/wukidukit_zutovowezewimev.pdf
    • http://returnonbrand.com/uploads/1/3/0/9/130969742/38c3f5bb5ecd1.pdf
    • http://goshoppinghere.com/uploads/1/3/0/3/130313445/kukapiwewewitu-xupokatubim-xoramovufogefub-tufuxen.pdf
    • http://islandscast.com/uploads/1/3/0/4/130483494/fomixavogawozixapi.pdf
    • http://soundengineercanada.com/uploads/1/3/0/6/130621063/biroru-pamakivovob-vipabifokud-lopifisizimesal.pdf
    • http://aliciamarierod.com/uploads/1/3/0/3/130324248/3c0c3be9ac0b.pdf
    • http://lisadring.com/uploads/1/3/0/2/130272083/8967776.pdf
    • http://www.restorativelearningactions.com/uploads/1/3/0/9/130969485/kitegofogixeroval.pdf
    • http://www.acadianaendo.com/uploads/1/3/0/3/130323315/3624676.pdf
    • http://paxlawmediation.com/uploads/1/3/0/5/130589317/sanimapomuraralopon.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_off00006e1d.bin
1d80abcc542c192b55fdaeeee86fede1980a2ec1572b707c08f9940d312b8999		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E1D 8640 bytes

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