Malicious PDF — malware analysis report

Static analysis result for SHA-256 abd0d81e81a3b62f…

MALICIOUS

PDF

36.7 KB Created: 2020-03-19 02:06:49 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1016db1082e78cef97e7e3040618b7a1 SHA-1: 63b0bba2a2582dcca4e22c83b0e776245e0924fc SHA-256: abd0d81e81a3b62f96272c03457d2c685932a7b101cb9ce186a10174f3fb12de
94 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, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains references to the URLs, suggesting a deliberate attempt to create a link farm. This pattern is often used to manipulate search engine rankings or to distribute further malicious payloads via the linked documents.

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://deborahsnider.com/uploads/1/3/0/5/130590105/130590105.html#la+silla+de+plata+pdf
    • http://www.ecsdoubledownraceway.com/uploads/1/3/0/9/130969139/ditazem.pdf
    • http://gloveside.net/uploads/1/3/0/7/130776810/6857543.pdf
    • http://74-123-72-6.mgwnet.com/uploads/1/3/0/7/130775245/luputajov-madeviji-xonow-gizino.pdf
    • http://volleyballintheq.com/uploads/1/3/1/0/131069874/49667d190d8.pdf
    • http://hostmaster.artyworkshops.co.uk/uploads/1/3/0/4/130476119/korunupago.pdf
    • http://www.rivieranannies.net/uploads/1/3/0/5/130590298/1329527.pdf
    • http://leadinlife.press/uploads/1/3/0/6/130639624/e621b1e18524.pdf
    • http://owayworks.com/uploads/1/3/0/2/130272945/1351834.pdf
    • http://newsightproductions.com/uploads/1/3/0/5/130544384/5dd8ef0c843736.pdf
    • http://icecreamformen.com/uploads/1/3/0/7/130775257/1386045.pdf
    • http://networkinginhighheels.com/uploads/1/3/0/5/130588579/737702.pdf
    • http://jy-la.org/uploads/1/3/0/3/130323632/wogigosekub-kebow.pdf
    • http://minhquando.com/uploads/1/3/0/6/130621279/ad3d31556cd.pdf
    • http://www.sunreadypower.com/uploads/1/3/0/5/130547024/4136826.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_off000065a8.bin
6b212cfab08ff1582ac3c6ea144e219649648cf8e35639f79ca04c8f43570c03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65A8 8452 bytes

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