Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f5b34b5e6fed225…

MALICIOUS

PDF

42.5 KB Created: 2020-03-15 02:15:23 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1e4d320e21199c6059a9647264630957 SHA-1: 16ab1d3f394c704771dcdefcedaa13ed2e1f954f SHA-256: 1f5b34b5e6fed22538e96c2044c8eeea76ec61411e7e9e1a264a29866c39c781
94 Risk Score

Malware Insights

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

This PDF document is classified as malicious due to its structure, which includes a large number of external links to other PDF files hosted on various domains. The document body, though partially corrupted, contains references to 'Digital cookbook templates' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The primary attack pattern involves redirecting users to a link farm designed to host numerous PDF files, likely for SEO manipulation or to distribute further 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://axis79.pleasingfood.com/uploads/1/3/0/6/130639709/130639709.html#digital+cookbook+templates
    • http://bondibaybotanicals.com/uploads/1/3/0/5/130551202/49730c.pdf
    • http://www.skateohcake.com/uploads/1/3/0/6/130639423/41071147.pdf
    • http://www.kohler.in.ua/uploads/1/3/0/4/130483153/junilove.pdf
    • http://mcfarlandtowing.com/uploads/1/3/0/6/130603889/lusazutabelek.pdf
    • http://mylureclaim.com/uploads/1/3/0/7/130775763/modaveloraj_rojizewig.pdf
    • http://looe-festival-of-the-sea.com/uploads/1/3/0/6/130639764/bosokulu.pdf
    • http://worshiphousemusic.com/uploads/1/3/0/5/130588772/8918346.pdf
    • http://ballerweekly.com/uploads/1/3/0/6/130621926/bazomaxu_najon.pdf
    • http://selfexpedition.com/uploads/1/3/0/6/130604269/wulenofuno_bovijisesanepif_zakigusaju_xinodebavujop.pdf
    • http://opas.org.au/uploads/1/3/0/5/130588999/lidelefetuzesot_xidaxuwu.pdf
    • http://naturaphysicaltherapy.org/uploads/1/3/0/5/130550814/muvebale_xiwajuvumedeb.pdf
    • http://rednosealliance.org/uploads/1/3/0/5/130550826/penemaris-fowitotewanun.pdf
    • http://crhardscape.com/uploads/1/3/0/2/130288661/5532690.pdf
    • http://magicwoodlandsstudio.com/uploads/1/3/0/6/130605107/a0a94bfe.pdf
    • http://espiritumaya.com/uploads/1/3/0/5/130546153/bodupasupidot_biwurud_pifenoduva.pdf
    • http://www.superdrywaterproofing.com/uploads/1/3/0/6/130620871/rizejotodopoj.pdf
    • http://cpanel.backinactionchiropractic.com/uploads/1/3/0/4/130483558/552395e900.pdf
    • http://bearsvsbabiesgame.net/uploads/1/3/0/6/130620952/zimubufozer.pdf
    • http://mta-sts.meho.org/uploads/1/3/0/5/130550973/solikesuku.pdf
    • http://www.swisspassions.org/uploads/1/3/0/4/130483513/681044.pdf
    • http://www.planpartproduct.com/uploads/1/3/0/6/130620393/masovajulam.pdf
    • http://clickdowntoearth.com/uploads/1/3/0/7/130739235/8141673.pdf
    • http://essentialaffair.com/uploads/1/3/0/6/130620760/7285042.pdf
    • http://partyrun.org/uploads/1/3/0/3/130313429/3606090.pdf
    • http://partyrun.org/
    • 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_off00007ced.bin
4019619ae0e3edd5192f665933fc80d434ce5d3a35abd3675ed9b01f195eb047		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CED 8048 bytes

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