Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ccc636e39db09dd…

MALICIOUS

PDF

51.1 KB Created: 2020-03-16 10:26:05 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: de70739ef33a2c1b1636b47f875365e6 SHA-1: 147a9e835e5828033aad0a5c2cb15da9e05213fd SHA-256: 7ccc636e39db09dd30fad558cfb3109b176d3cdfab32e99cd8f156e539080d2f
94 Risk Score

Malware Insights

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

The PDF_SEO_LINK_FARM heuristic indicates this document contains a large number of external links, a common tactic for distributing malicious content or directing users to phishing sites. The ML_NYX_PDF_MALICIOUS model also strongly flagged this file as malicious. The embedded URLs, such as http://socialstockwoman.com/uploads/1/3/0/4/130488175/8333676.pdf, are likely part of this malicious link farm. No scripts were extracted from this sample.

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://74-123-73-178.mgwnet.com/uploads/1/3/0/9/130969932/130969932.html#d
    • http://socialstockwoman.com/uploads/1/3/0/4/130488175/8333676.pdf
    • http://www.pet-flyers.com/uploads/1/3/0/4/130483592/9531350.pdf
    • http://www.rmeanvilhammer.com/uploads/1/3/0/2/130287976/6221444.pdf
    • http://wrapworthyoh.com/uploads/1/3/0/8/130814032/pomepabog.pdf
    • http://www.oregonacoustictreatments.com/uploads/1/3/0/4/130488698/8576650.pdf
    • http://madinternet.co.vu/uploads/1/3/0/7/130775730/2923408.pdf
    • http://www.pendulumhealing.com/uploads/1/3/0/5/130546036/baluvi.pdf
    • http://mta-sts.mail.detarconstruction.com/uploads/1/3/0/8/130874163/pobomuradinonuwifim.pdf
    • http://www.mccbritainstudyabroad.com/uploads/1/3/0/8/130874075/1064805.pdf
    • http://proaccessinc.com/uploads/1/3/0/5/130539279/vipetuvi_zekuviwupa.pdf
    • http://tapleydugas.com/uploads/1/3/0/4/130488217/2383143.pdf
    • http://www.tank-hill.com/uploads/1/3/0/3/130323765/0e91ac03e6.pdf
    • http://sub2000ati.com/uploads/1/3/0/5/130588787/4396113.pdf
    • http://www.michaeldeaton.com/uploads/1/3/0/7/130739517/5037391.pdf
    • http://cpanel.lisaspykers.com/uploads/1/3/1/0/131070169/mozonowetut.pdf
    • http://shapinguptheupstate.com/uploads/1/3/0/4/130476068/6362901.pdf
    • http://www.i-0aicfb4feydte4.online/uploads/1/3/0/2/130272231/pasoreposewutos-dalanajan-pujaz.pdf
    • http://fbcnash.org/uploads/1/3/0/4/130483213/votediwa-dininevaraligid-kexulilor.pdf
    • http://trustedfinancialpro.com/uploads/1/3/0/5/130539114/kolixisit.pdf
    • http://cablackwomendemclub.com/uploads/1/3/0/6/130604896/totese.pdf
    • http://themotiontimes.com/uploads/1/3/0/4/130483656/katukumi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008e39.bin
2c4810022e977eb91c294bbf10f8cda6b532512475912cf7c8cad90b6b98de05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E39 12064 bytes
font_01_sfnt_off0000b458.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB458 2652 bytes

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