Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad01d1b1bc7bef80…

MALICIOUS

PDF

44.9 KB Created: 2020-04-04 06:28:09 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d4de516a6fe2a16a4ee3136316062bc5 SHA-1: a77b07a7fccd69115a7897b45aaa4f7a2ad5de2a SHA-256: ad01d1b1bc7bef803155ff47eead462005d4fe376036aab0603f676aac59d4f8
94 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO poisoning or phishing lures. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to external URLs, including one that appears to be a lure for a game guide. These links likely lead to malicious content or further stages of an 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://smokin.tires/uploads/1/3/0/7/130775780/130775780.html#dragon+age+inquisition+mage+tree+guide
    • http://shopbyrc.com/uploads/1/3/0/6/130640133/mulijaxizu.pdf
    • http://jillybeancakes78.com/uploads/1/3/1/4/131410167/44141a.pdf
    • http://rozenblatrealtygroup.com/uploads/1/3/0/2/130289377/lokovobewosif.pdf
    • http://cryptosunrising.com/uploads/1/3/0/7/130738559/2408825.pdf
    • http://badlandsflagcompany.com/uploads/1/3/0/9/130969173/wurupos.pdf
    • http://bjcconstructrapid.com/uploads/1/3/0/4/130476162/157728.pdf
    • http://asapnew913.com/uploads/1/3/0/6/130640024/9495126.pdf
    • http://newproductinstitute.info/uploads/1/3/0/6/130639853/fa356781426cb.pdf
    • http://higradenc.com/uploads/1/3/0/8/130874467/gugak.pdf
    • http://sacredearthministry.org/uploads/1/3/1/1/131163516/walugobipa-nuxupu-virexetamadure.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_off00008509.bin
aacd2382381db99f0f656826200ebabb22258208e43a1ca8a022e7bcc1f52b0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8509 8324 bytes

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