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) First seen: 2020-09-24
MD5: de70739ef33a2c1b1636b47f875365e6 SHA-1: 147a9e835e5828033aad0a5c2cb15da9e05213fd SHA-256: 7ccc636e39db09dd30fad558cfb3109b176d3cdfab32e99cd8f156e539080d2f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links likely serve as a link farm to direct users to potentially malicious websites. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

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 PDF link annotation
    • http://socialstockwoman.com/uploads/1/3/0/4/130488175/8333676.pdfIn PDF document text
    • http://www.pet-flyers.com/uploads/1/3/0/4/130483592/9531350.pdfIn PDF document text
    • http://www.rmeanvilhammer.com/uploads/1/3/0/2/130287976/6221444.pdfIn PDF document text
    • http://wrapworthyoh.com/uploads/1/3/0/8/130814032/pomepabog.pdfIn PDF document text
    • http://www.oregonacoustictreatments.com/uploads/1/3/0/4/130488698/8576650.pdfIn PDF document text
    • http://madinternet.co.vu/uploads/1/3/0/7/130775730/2923408.pdfIn PDF document text
    • http://www.pendulumhealing.com/uploads/1/3/0/5/130546036/baluvi.pdfIn PDF document text
    • http://mta-sts.mail.detarconstruction.com/uploads/1/3/0/8/130874163/pobomuradinonuwifim.pdfIn PDF document text
    • http://www.mccbritainstudyabroad.com/uploads/1/3/0/8/130874075/1064805.pdfIn PDF document text
    • http://proaccessinc.com/uploads/1/3/0/5/130539279/vipetuvi_zekuviwupa.pdfIn PDF document text
    • http://tapleydugas.com/uploads/1/3/0/4/130488217/2383143.pdfIn PDF document text
    • http://www.tank-hill.com/uploads/1/3/0/3/130323765/0e91ac03e6.pdfIn PDF document text
    • http://sub2000ati.com/uploads/1/3/0/5/130588787/4396113.pdfIn PDF document text
    • http://www.michaeldeaton.com/uploads/1/3/0/7/130739517/5037391.pdfIn PDF document text
    • http://cpanel.lisaspykers.com/uploads/1/3/1/0/131070169/mozonowetut.pdfIn PDF document text
    • http://shapinguptheupstate.com/uploads/1/3/0/4/130476068/6362901.pdfIn PDF document text
    • http://www.i-0aicfb4feydte4.online/uploads/1/3/0/2/130272231/pasoreposewutos-dalanajan-pujaz.pdfIn PDF document text
    • http://fbcnash.org/uploads/1/3/0/4/130483213/votediwa-dininevaraligid-kexulilor.pdfIn PDF document text
    • http://trustedfinancialpro.com/uploads/1/3/0/5/130539114/kolixisit.pdfIn PDF document text
    • http://cablackwomendemclub.com/uploads/1/3/0/6/130604896/totese.pdfIn PDF document text
    • http://themotiontimes.com/uploads/1/3/0/4/130483656/katukumi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008e39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E39 12064 bytes
SHA-256: 2c4810022e977eb91c294bbf10f8cda6b532512475912cf7c8cad90b6b98de05
font_01_sfnt_off0000b458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB458 2652 bytes
SHA-256: e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc

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