Malicious PDF — malware analysis report

Static analysis result for SHA-256 944c16c764530566…

MALICIOUS

PDF

43.9 KB Created: 2020-03-28 02:51:16 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e9b29143735084eb8f420eefb63bd0c0 SHA-1: e01bde7133c96efd42fcf07ae4d10bcbe06dee6c SHA-256: 944c16c764530566998fd563bc20bff9587f4a5a60eb47e34beb8392b7136a65
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. The document body text is largely unreadable, but the presence of the URL 'http://bloodblisterapparel.com/uploads/1/3/0/6/130639382/130639382.html#como+convertir+cm+a+pies+formula' suggests a potential lure related to unit conversion, which is then used to mask the malicious intent of linking to numerous other domains.

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://bloodblisterapparel.com/uploads/1/3/0/6/130639382/130639382.html#como+convertir+cm+a+pies+formula
    • http://www.lapeerhabitat.com/uploads/1/3/0/7/130740184/7c6c179f712fed.pdf
    • http://madetogiveministries.com/uploads/1/3/0/6/130604264/bewigat.pdf
    • http://securethecrownza.com/uploads/1/3/1/0/131070849/3cc72ac6.pdf
    • http://samibox.net/uploads/1/3/0/7/130776864/vizejujavo.pdf
    • http://www.magickmorning.com/uploads/1/3/0/6/130639518/powalawudutikid_fakeronafatav_miraf_lewetezejof.pdf
    • http://dredge.biz/uploads/1/3/0/7/130775384/bad9fe49de.pdf
    • http://alwaysperfectsheet.com/uploads/1/3/0/8/130813111/9306193bc59575b.pdf
    • http://paradiseuganda.net/uploads/1/3/0/6/130604804/9205795.pdf
    • http://www.ronwaltonactor.com/uploads/1/3/0/6/130621523/pemalexonaj-zibuzorop-juviromafodoso-motodazifivide.pdf
    • http://waythroughthewildernesshandwovens.com/uploads/1/3/0/8/130813511/kejabudo_miwiweb.pdf
    • http://partitionnow.com/uploads/1/3/0/3/130379435/vurixukirigu.pdf
    • http://www.pwnlisbon.com/uploads/1/3/0/6/130639634/1475066.pdf
    • http://naturalbeautybynature.com/uploads/1/3/0/7/130775752/6255482.pdf
    • http://solermerwatches.com/uploads/1/3/0/2/130289668/jabulamur-malegit-midamonuvo.pdf
    • http://thegreenlightmovement.com/uploads/1/3/1/1/131164234/6177767.pdf
    • http://jkjlawnsprinkler.com/uploads/1/3/0/6/130621378/dusezenibetiwe-kujawafotakako-nolimegipabep.pdf
    • http://stygianvineyards.com/uploads/1/3/0/6/130605168/fa8142b80cc3.pdf
    • http://lmpthereviewmagazine.com/uploads/1/3/0/7/130738715/susenejopazu_daxozasemo_gatar.pdf
    • http://benprocter.com.au/uploads/1/3/0/8/130874260/4884364.pdf
    • http://lightcodesmusic.com/uploads/1/3/1/3/131383269/2be569e4a87ebd7.pdf
    • http://fighting4wayne.org/uploads/1/3/0/3/130323237/2168c6ecdd5ee1.pdf
    • http://www.killerwaxxgeorgia.com/uploads/1/3/0/9/130969294/buxizeto.pdf
    • http://anufloattherapy.com/uploads/1/3/0/7/130739032/nejusabexiwikixaj.pdf
    • http://www.sd50dfl.net/uploads/1/3/0/7/130775756/c6b03b6057f283.pdf
    • http://anufloatth
    • 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_off0000822d.bin
7a7391e863739fab7468b976ecda80c1006df3979e784462471776de7c03e73f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x822D 8204 bytes

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