Malicious PDF — malware analysis report

Static analysis result for SHA-256 60906b634042e282…

MALICIOUS

PDF

38.6 KB Created: 2020-03-21 21:28:14 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b29f678484ff8d08378e1da7b46282e5 SHA-1: d9a76979b47f481b088948ca9e3bc180b4da4ea5 SHA-256: 60906b634042e282c2c15ec30ee9aab793e4a5a30fd764023231e51a679651ca
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links pointing to various domains, indicating a link farm or SEO spam operation. The ML classifier strongly flagged this PDF as malicious, and the heuristic firings confirm the presence of a link farm. No scripts were extracted, but the sheer volume of outbound links suggests an attempt to manipulate search engine rankings or direct users to potentially malicious content.

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://americanfiresuppress.com/uploads/1/3/0/4/130477335/130477335.html#tipos+de+ciencia+formal+y+factica
    • http://roomshakerrecords.com/uploads/1/3/0/4/130435943/555d176433.pdf
    • http://pmcpaintingscom.com/uploads/1/3/0/7/130776852/milow.pdf
    • http://mx.pastelsinbloom.com/uploads/1/3/1/1/131164156/dilovoluxuxope-xukuxakuzimur-wevidozesimare.pdf
    • http://convectionery.co.uk/uploads/1/3/0/6/130604218/fagebuzuwuripi.pdf
    • http://chelseateeth.com/uploads/1/3/0/3/130323110/9975746.pdf
    • http://andrewtimmer.com.au/uploads/1/3/0/2/130288926/tidinowiluxewu_mimemuwuroxaba.pdf
    • http://letmejustwrite.com/uploads/1/3/0/5/130546391/f8f32ea5b74e18.pdf
    • http://www.mmnflowers.com/uploads/1/3/0/4/130476619/904780f789.pdf
    • http://mail.mimeya.be/uploads/1/3/0/5/130543074/varizolewuresi.pdf
    • http://www.bellaandmay.com/uploads/1/3/0/6/130604836/xizotunuw.pdf
    • http://therisingsuncottage.com/uploads/1/3/0/5/130588352/9a56e72660e6a47.pdf
    • http://mail.dougscars.com/uploads/1/3/0/4/130488063/2663067.pdf
    • http://sauceis4ever.com/uploads/1/3/0/7/130739662/f949d4e4d8.pdf
    • http://potenc-man.space/uploads/1/3/0/6/130604768/0d8ee66159ef8.pdf
    • http://arsetpraxis.com/uploads/1/3/1/0/131070631/birog.pdf
    • http://frogs-flies.com/uploads/1/3/0/8/130814133/6717347.pdf
    • http://sobroradio.com/uploads/1/3/0/7/130738738/kokato_refipu.pdf
    • http://luhd-mics.com/uploads/1/3/0/3/130323377/begaxuwutexonuzalu.pdf
    • http://duskcollaborative.org/uploads/1/3/0/5/130588606/pugiwakuwopomif-rokok.pdf
    • http://carepackagesrus.org/uploads/1/3/0/6/130640090/zazisog.pdf
    • http://nvlpr.com/uploads/1/3/0/4/130488833/11264778.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_off00006f47.bin
22cd71f7fe8c6f3e1f20e2290e8135daa64b2d37bc1b35dbb2f8661ba567504e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F47 8104 bytes