Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d08abe702440567…

MALICIOUS

PDF

42.5 KB Created: 2020-03-23 09:06:11 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d3265ae26fcc475e2aaca24217caf73e SHA-1: f9ee41226cbcab6884701075e4b1d9ed712a63fb SHA-256: 8d08abe702440567c9bcdfe845e8f7199e93d5d946b02978d5fb974f1a1f6594
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The embedded URLs likely lead to further malicious content or phishing pages. The document body text appears to be obfuscated or corrupted, but the presence of the URLs and the heuristic firings strongly suggest a link farm or redirection 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://totallydreams.com/uploads/1/3/0/5/130590738/130590738.html#mercancias+en+transito+y+cuentas+de+orden
    • http://www.heyhailie.com/uploads/1/3/0/6/130620710/widezixun.pdf
    • http://www.lecuyervoicetalent.com/uploads/1/3/0/2/130271211/2371068.pdf
    • http://eldesvandeekolu.com/uploads/1/3/0/8/130874316/5412219.pdf
    • http://adminlige.com/uploads/1/3/0/7/130740465/2667855.pdf
    • http://www.pantsbysamstore.com/uploads/1/3/0/7/130738603/2f43844575a27b0.pdf
    • http://tomcookephotography.com/uploads/1/3/0/3/130379583/d1268b4859c.pdf
    • http://alfonsinario2016.com/uploads/1/3/0/7/130738963/8197289.pdf
    • http://allabouthomerecording.com/uploads/1/3/0/7/130738805/vatiriri.pdf
    • http://soundoftheshoals.com/uploads/1/3/0/5/130540714/60911.pdf
    • http://www.lincolnnebraskadance.puremovementdance.com/uploads/1/3/0/4/130489763/nadizekatopaboge.pdf
    • http://b2bmaintenance.com/uploads/1/3/0/2/130274282/b4286889dbf820.pdf
    • http://bandmcrushers.com/uploads/1/3/0/6/130604654/fuvubiru.pdf
    • http://www.incphotoset.com/uploads/1/3/0/7/130739876/4727176.pdf
    • http://realmisterketo.com/uploads/1/3/0/4/130489898/55f593.pdf
    • http://heartlinkhealing.com/uploads/1/3/0/3/130323167/7895903.pdf
    • http://jmservicos.net/uploads/1/3/0/7/130776682/a03b2c.pdf
    • http://shrewsburydaycare.com/uploads/1/3/0/8/130814716/ferazo.pdf
    • http://tbkhoneyco.com/uploads/1/3/0/5/130550960/5610156.pdf
    • http://judithfordham.com/uploads/1/3/0/2/130287882/fikarejan_loxatudem_tixivasoved_rizoxolak.pdf
    • http://madisonelisabeth.com/uploads/1/3/0/5/130590395/wapozelijed_pazuliv_sidovuxot_jopuvidos.pdf
    • http://www.lancerrobotics.org/uploads/1/3/0/4/130476004/8828423.pdf
    • http://gosnads.fun/uploads/1/3/0/3/130323717/3cb3511c60.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_off00007964.bin
4f83886e50f7e8e535aefeab21d555702d5d80f82b578a3d7a42f89487b1da23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7964 9180 bytes

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