Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c96410853253412…

MALICIOUS

PDF

43.4 KB Created: 2020-03-22 03:23:56 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ec780163ce292b91654b966f7db9760b SHA-1: 00f139a80f3559bafbe3f776850e5e7d6bfd425d SHA-256: 5c964108532534126c6a3d98d7d21d6570f1e1cfdb0cc63b09d0b70e7fdf8df8
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. The ML classifier also strongly indicated maliciousness. The embedded document body text, though partially corrupted, contains a URL that is also present in the list of extracted URLs, reinforcing the link-based attack pattern. No scripts were extracted from this sample.

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://cityonloc.com/uploads/1/3/0/2/130272332/130272332.html#que+es+segmentacion+psicografica+ejemplos
    • http://www.adnaturasport.hr/uploads/1/3/0/8/130874066/3152213.pdf
    • http://vegmancontrol.com/uploads/1/3/0/6/130621116/2418738.pdf
    • http://ltagroup.us/uploads/1/3/0/9/130969678/4883271.pdf
    • http://bridgeequitiesadvisors.com/uploads/1/3/0/4/130483647/sajadeburijujub_wilekakinus_duxigix.pdf
    • http://lillgallery.com/uploads/1/3/1/1/131164406/dijaso.pdf
    • http://www.e-stringer.com/uploads/1/3/0/6/130604613/zaduvu.pdf
    • http://rr7cc.com/uploads/1/3/0/7/130775215/mefirole.pdf
    • http://donnezonline.com/uploads/1/3/0/4/130483825/e5b49dfe.pdf
    • http://commissionco.com/uploads/1/3/0/5/130544257/vogivojokam-bajitil-felewuji-bapisejapotevu.pdf
    • http://niedfulthings.com/uploads/1/3/0/6/130605516/06b3fcb8bc176.pdf
    • http://bethevibration.com/uploads/1/3/0/7/130740465/8545681.pdf
    • http://www.edonegioielli.com/uploads/1/3/0/4/130483428/rulexot_zimikuzulosuj_libole_lilopo.pdf
    • http://businessempoweredstyle.com/uploads/1/3/0/5/130588574/9400762.pdf
    • http://webmail.asrar103.com/uploads/1/3/0/3/130323437/74b6c.pdf
    • http://brunoalonsoiglesias.com/uploads/1/3/0/6/130620423/2978493.pdf
    • http://www.myaishaalzaabi.com/uploads/1/3/0/7/130739227/gakunap.pdf
    • http://christopherabeel.com/uploads/1/3/0/3/130312972/beverotoxirog.pdf
    • http://3mdesigns.biz/uploads/1/3/0/6/130605493/6548578.pdf
    • http://smash-cake.kaseyfraley-photography.com/uploads/1/3/0/7/130739706/309336.pdf
    • http://driftroot.com/uploads/1/3/0/3/130323164/6f197b.pdf
    • http://olsonimmigration.com/uploads/1/3/0/4/130488141/jezepuwafatikamigewe.pdf
    • http://f1dpc.com/uploads/1/3/0/3/130323196/2932983.pdf
    • http://www.halfwayhousemixing.co.uk/uploads/1/3/0/6/130621607/5679467.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_off00007e94.bin
e6885f2e05346d1cb2dc8ef52cd0063d9a4e9ed34eec96de3b3ae8f810a2a883		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E94 8732 bytes

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