Malicious PDF — malware analysis report

Static analysis result for SHA-256 044c0846190bd538…

MALICIOUS

PDF

43.8 KB Created: 2020-03-13 04:42:26 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 82c9117f72d55ebe9ea618ac0c015456 SHA-1: 70a83ee8da7b5c720365e2e155ac5a97bfd49e20 SHA-256: 044c0846190bd538aa1a0e3ef0ecaf8ed082dca32d61015a130672c598f4a7cf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a large number of embedded external links, a common tactic for SEO manipulation or to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it acts as a dropper or redirector, likely leveraging embedded JavaScript to facilitate these actions.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • ClamAV: Pdf.Dropper.Agent-8071054-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8071054-0
  • 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://mynaturalhairspa.com/uploads/1/3/0/7/130738553/130738553.html#arrowhead+mills+organic+peanut+butter+aflatoxin
    • http://www.worldfooddestination.com/uploads/1/3/0/8/130874252/tawemes.pdf
    • http://hairstyliste.nl/uploads/1/3/0/9/130969386/7632aa2.pdf
    • http://alanflemingtournament.com/uploads/1/3/0/7/130739240/9499936.pdf
    • http://hoperestoreduk.com/uploads/1/3/0/2/130270932/5416557.pdf
    • http://www.challenge-by-choice.eu/uploads/1/3/0/7/130740260/rodapax-medobe.pdf
    • http://www.shopdorothys.com/uploads/1/3/0/7/130740561/rimebike.pdf
    • http://castlehilltop.com/uploads/1/3/0/4/130488265/bumexizuselog-nagoramixilaj-kawes-jedikuxupoditi.pdf
    • http://hostmaster.azoell.com/uploads/1/3/0/4/130488357/muzavejokafoba-mowinabitemirok.pdf
    • http://topdogracing.net/uploads/1/3/0/4/130488362/5790200.pdf
    • http://spire-athletic.de/uploads/1/3/0/6/130603764/dugubamakavakin.pdf
    • http://www.elisevelasco.com/uploads/1/3/0/4/130488087/jewupoforuzazat.pdf
    • http://generalmaintenanceservice.com/uploads/1/3/0/6/130603747/94bce16f0.pdf
    • http://briarpipery.com/uploads/1/3/0/7/130776008/fedalijorufubu.pdf
    • http://wrestlingonfire.com/uploads/1/3/0/7/130739180/8123211.pdf
    • http://goldstarhairocala.com/uploads/1/3/0/6/130604576/mivim.pdf
    • http://chandlerelectronicsgroup.com/uploads/1/3/0/6/130621317/bijibifufipude_gawuxinad_zagimew_dobujiluw.pdf
    • http://www.greenconference.com.ua/uploads/1/3/0/5/130551512/f090f40d49348.pdf
    • http://adoptedbyjets.com/uploads/1/3/0/7/130776436/5092613.pdf
    • http://www.simplebettingtips.com/uploads/1/3/0/5/130590416/9edb4e.pdf
    • http://snsminersville.com/uploads/1/3/0/6/130639025/3548815.pdf
    • http://mag-photography.org/uploads/1/3/0/6/130621322/luzugubobikurokad.pdf
    • http://researchonunitedstates.com/uploads/1/3/0/4/130476327/3504670.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_off0000809b.bin
cb40070e0c61297270bd121416361649b04e01d3654927ec53cb1f90dd4a5080		 pdf-font-stream PDF embedded font (sfnt) at offset 0x809B 8544 bytes

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