Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e1409f3490bf8ef…

MALICIOUS

PDF

39.1 KB Created: 2020-03-29 09:48:28 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 30972c31aed396d3daff5366f7ceacc3 SHA-1: a1af2f44d1193e4716dc15da59f3e538ad20a00d SHA-256: 4e1409f3490bf8efcb0654cf12f25ad4f5c8253e530b92fc178798f6dabf4fc7
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains URLs that are part of this link farm, suggesting a coordinated effort to direct users to potentially harmful content or for SEO manipulation. No scripts were extracted, limiting the analysis of direct payload execution.

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://mindforyou.org/uploads/1/3/0/6/130605018/130605018.html#tabla+de+conversion+de+gr+a+ml
    • http://shop.akcesoriacorp.com/uploads/1/3/0/4/130476598/lezujo-rovijikenafaxi-runewirek-viwes.pdf
    • http://novenaforthefamily.com/uploads/1/3/0/6/130603783/kedopikokuta_bofoxiwedebij_jazijabonimiri_tedovivafiragut.pdf
    • http://92wellness.com/uploads/1/3/0/2/130288455/1896289.pdf
    • http://vickyclean.com/uploads/1/3/0/5/130541285/nezef.pdf
    • http://ourmotherofsorrows.church/uploads/1/3/0/7/130739188/kafuvesad_raritumo.pdf
    • http://nurseries.shop/uploads/1/3/0/6/130604368/2289423.pdf
    • http://itsredclothing.com/uploads/1/3/0/5/130540746/gopefenufilomudoboti.pdf
    • http://domoliseo.com/uploads/1/3/0/6/130604566/6ebcd10074cff.pdf
    • http://buttercreamfestival.com/uploads/1/3/0/4/130436181/powewej.pdf
    • http://treentops.com/uploads/1/3/0/6/130639266/pepifunevezowiwiruw.pdf
    • http://anthropolygon.com/uploads/1/3/0/7/130775784/gotexotatawowukumeri.pdf
    • http://employee-segmentation.com/uploads/1/3/0/5/130550880/4640315.pdf
    • http://ghpaintingservices.com/uploads/1/3/0/7/130775376/2557459.pdf
    • http://www.bestofofftherack.com/uploads/1/3/0/6/130640057/1553794.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_off00006be3.bin
717ea8775f5ad04ac1fa93edc055c07ceac02a770b4944e94c7f53c25edab024		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE3 9376 bytes

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