Malicious PDF — malware analysis report

Static analysis result for SHA-256 6df00c1f2accee13…

MALICIOUS

PDF

35.1 KB Created: 2020-06-01 20:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 068b167d0a40a666b10babbb0196d037 SHA-1: 1cfff87e38f39240a90bd07643f5a6e7595c4e39 SHA-256: 6df00c1f2accee132e0c47cb4cd418737389123b5d06e5dc4bb266d6a608d722
104 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to other PDFs, suggesting a link farm or redirection mechanism. The presence of a "download button" lure and the ML classifier's high confidence score indicate a malicious intent to trick the user into downloading further malicious content. The document body itself contains embedded URLs that are likely part of this lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://mjbprolightsandsounds.com/uploads/1/3/0/2/130273762/130273762.html#pocket+envelope+template+free
    • http://colorobstaclerush.eu/uploads/1/3/0/2/130288642/wavitozepavibowu.pdf
    • http://elitetattooneedles.com/uploads/1/3/0/6/130604093/04a724b6.pdf
    • http://fractionmedia.com.au/uploads/1/3/0/7/130775905/morasapevukelo.pdf
    • http://mjbprolightsandsounds.com/uploads/1/3/0/2/130273762/terms.html
    • http://mjbprolightsandsounds.com/uploads/1/3/0/2/130273762/dmca.html
    • http://mjbprolightsandsounds.com/uploads/1/3/0/2/130273762/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fixewafoman.files.wordpress.com/2020/05/kugutakixeseranulifukus.pdf
    • https://somotug.files.wordpress.com/2020/05/16938570342.pdf
    • https://romepaxa.files.wordpress.com/2020/06/71075294014.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cbd.bin
6bcdee38a9bdcf426a5e03d29cc2f6fc0b6d4063d2eb6bab78ab35583aa0d941		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CBD 10396 bytes

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