Malicious PDF — malware analysis report

Static analysis result for SHA-256 493d00adf39e90e8…

MALICIOUS

PDF

48.0 KB Created: 2020-05-17 00:55:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 5369ff2fed1e8311137c93e120ce3e33 SHA-1: 3d2c1f717d4475b58d84215fe03a672cc19b34d5 SHA-256: 493d00adf39e90e8f9f7461df6afc6b8a6b2e4a821390d6829bda4b5a48ffc2f
96 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 on different domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The document body itself contains garbled text but includes the primary URL, suggesting the user is intended to click through to external resources. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://alfornohk.com/uploads/1/3/1/3/131398452/131398452.html#meaningful+report+card+comments+for+improvement PDF link annotation
    • http://vintagehomedecoroldsaybrook.com/uploads/1/3/1/4/131452884/3007314.pdfIn PDF document text
    • http://lotsforsalellc.com/uploads/1/3/0/7/130739081/rapibetafete-nepalizebugonu.pdfIn PDF document text
    • http://ratingburgers.com/uploads/1/3/0/4/130489909/xafasafisuxoxiro.pdfIn PDF document text
    • http://anilpatrickpatel.com/uploads/1/3/1/0/131070291/buxidezawegu.pdfIn PDF document text
    • http://javasisters.com/uploads/1/3/0/7/130775536/04f9fa59a8c2c03.pdfIn PDF document text
    • http://ooluk.com/uploads/1/3/0/7/130776254/sutilak-lulativoluded-vovus.pdfIn PDF document text
    • http://vizora.org/uploads/1/3/0/4/130483561/2376583.pdfIn PDF document text
    • http://mktransportandcontractinginc.com/uploads/1/3/0/2/130271184/6298391.pdfIn PDF document text
    • http://testingoutasitebuilder.net/uploads/1/3/0/3/130313237/12b82647.pdfIn PDF document text
    • http://wayofmagic.com/uploads/1/3/1/8/131871453/6785271.pdfIn PDF document text
    • http://jrjstrategy.com/uploads/1/3/1/4/131453919/duzefesi.pdfIn PDF document text
    • http://divasdominicanhair.net/uploads/1/3/0/3/130312991/2354282.pdfIn PDF document text
    • http://sheillanjoto.com/uploads/1/3/0/7/130740420/sigizaso.pdfIn PDF document text
    • http://bcmkinc.com/uploads/1/3/0/4/130476229/92f1665583.pdfIn PDF document text
    • http://pinellaspaddlesports.com/uploads/1/3/1/4/131407011/jabesuk_xumod.pdfIn PDF document text
    • http://mcsalesandservice.com/uploads/1/3/0/7/130776783/mezagabelopenesazom.pdfIn PDF document text
    • http://thepowerofourwords.com/uploads/1/3/0/5/130539179/7786a08a07f87.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 5

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_off000090b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90B3 10380 bytes
SHA-256: fdfa1e6817dc801893e49700cbb7b50ff6f46a1631861338ca558c12f28d6ed8

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