Malicious PDF — malware analysis report

Static analysis result for SHA-256 21bf6a8c733eb14b…

MALICIOUS

PDF

39.3 KB Created: 2020-03-08 11:14:50 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2e7a34986176cb80911dfc09380f9d0f SHA-1: 40142772b2af54602ba4ed433f571d46300d1bd8 SHA-256: 21bf6a8c733eb14b27eb5666623bb1d03aca3c4e4a4aa894fc8380b71ede1965
94 Risk Score

Malware Insights

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

The PDF document contains a deceptive link, presented as an 'adobe pdf reader download apk', which directs users to a URL likely hosting a malicious payload. The PDF_SEO_LINK_FARM heuristic indicates a large number of similar external links, suggesting a campaign to distribute malware through deceptive content. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of this file.

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://11.bpmtc.com/uploads/1/3/0/4/130488476/130488476.html#adobe+pdf+reader+download+apk
    • http://www.janine-online.com/uploads/1/3/0/7/130739780/xaledegizekevowoku.pdf
    • http://mtgrahams.com/uploads/1/3/0/2/130289310/zeweramexojomo-zuwosi.pdf
    • http://hostmaster.ebamg.com/uploads/1/3/0/5/130588389/kutesuzam.pdf
    • http://www.accounttorres.com/uploads/1/3/0/7/130775701/wulukixixikoj-remutawiv-kamuboz.pdf
    • http://www.gracerestoredchurchofjesuschristlastdaysaints.net/uploads/1/3/0/4/130477492/wujiro-xexafubegotu-pufovudidofodab.pdf
    • http://www.broomfieldbabybereavement.co.uk/uploads/1/3/0/5/130588349/likewomipufen.pdf
    • http://contractor-exam.mobi/uploads/1/3/0/8/130814040/fadf54d4da9f.pdf
    • http://stakemywallets.com/uploads/1/3/0/7/130774973/1839983.pdf
    • http://theplatoonsystem.com/uploads/1/3/0/5/130589044/2197382.pdf
    • http://10122006.com/uploads/1/3/0/5/130551137/5136465.pdf
    • http://quietspeculation.net/uploads/1/3/0/7/130740199/0d87145b97b4ac.pdf
    • http://ramsayband.com/uploads/1/3/0/7/130738704/6663877c2e4.pdf
    • http://gayflava.com/uploads/1/3/0/3/130313541/xipewupanegis.pdf
    • http://www.skincandysoapworks.com/uploads/1/3/0/4/130483273/6773243.pdf
    • http://mrbcontructionllc.com/uploads/1/3/0/4/130488512/mukusoxebixovof_taxikutujo.pdf
    • http://www.justmakemehappy.com/uploads/1/3/0/6/130604030/baferiwisokotuxu.pdf
    • http://brebrowncreative.com/uploads/1/3/0/4/130489122/lazabewege.pdf
    • http://trinitymindedmarketplace.com/uploads/1/3/0/2/130274028/ludenubotibub.pdf
    • http://allthings-change.com/uploads/1/3/0/6/130604703/5754992.pdf
    • http://kalamazoocalendarproject.com/uploads/1/3/0/4/130488615/fifosupixed.pdf
    • http://www.msholguins4thgrade.com/uploads/1/3/0/7/130740616/fcc9ba7b02bd793.pdf
    • http://pizzabellarestaurant.net/uploads/1/3/0/3/130323268/wifobeponapozagol.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_off00006f13.bin
933e4b386ad972eb13e126263a451617c349eb61bbfcea6b031cccc6e8556045		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F13 8636 bytes

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