Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bb628e1252d5168…

MALICIOUS

PDF

34.9 KB Created: 2020-04-11 14:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b9d922fdb83e7675414bc1362ba3187f SHA-1: e334934cbf18dc14340cb22776734c5ac53344d3 SHA-256: 2bb628e1252d516898dfd3a105af8e06307f87e035ce99d00d9a61af8b1e3fb9
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to other PDF files on unrelated domains. The document body and embedded links suggest a lure for free MP3 downloads, which is a common tactic for distributing malware. The PDF_SEO_LINK_FARM heuristic indicates a deliberate attempt to create a link farm, likely for SEO manipulation or to host malicious content. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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
  • 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://northernrailleaders.com/uploads/1/3/1/3/131379443/131379443.html#no+promises+demi+lovato+mp3+download+free
    • http://affordable-lawncare.org/uploads/1/3/1/4/131407051/fusunijabiguna.pdf
    • http://noisemakerindustries.com/uploads/1/3/0/3/130379380/duzivokefijukepoxexo.pdf
    • http://conradarchitectureanddesign.com/uploads/1/3/0/4/130435807/lanodi.pdf
    • http://frantestportsmouth.com/uploads/1/3/0/9/130969703/21be09.pdf
    • http://inannasmoon.com/uploads/1/3/0/5/130551597/613f84ce.pdf
    • http://malcomsupplyco.com/uploads/1/3/0/7/130775461/be49fa1f805.pdf
    • http://woodfordgardensescape.com/uploads/1/3/0/5/130588769/3623730.pdf
    • http://pennington-automotive.com/uploads/1/3/0/3/130313307/6e0c05.pdf
    • http://brightonbeer.com/uploads/1/3/0/3/130379132/9137016.pdf
    • http://callylawson.com/uploads/1/3/1/4/131438353/dugasonitu-sogedobovi-waxinaxedu-temarod.pdf
    • http://nameagorilla.org/uploads/1/3/0/2/130289246/8913f399f.pdf
    • http://deeparra.com/uploads/1/3/0/3/130379295/6ebb3f31.pdf
    • http://jlpventures.com/uploads/1/3/1/4/131438693/1958496.pdf
    • http://amsuri.com/uploads/1/3/1/4/131437733/xofulepimo_lejoze.pdf
    • http://mindfulnesshw.com/uploads/1/3/0/5/130588693/4042700.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_off00005c1a.bin
45325457b4fdbcce443979e0cea6294b2dac90085af32c1f9490fcfc0c2dab06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C1A 10124 bytes

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