Malicious PDF — malware analysis report

Static analysis result for SHA-256 96c87b8000c5cf37…

MALICIOUS

PDF

41.2 KB Created: 2020-03-11 13:03:41 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2dd595da16927f9311c6212f20efac8c SHA-1: 4fbfe5e8cab67f869da1c755515e8e8ac8f048b4 SHA-256: 96c87b8000c5cf3705cd482cf34a588dc59e9ddc2a1d473ed141ebf66e37d3fe
94 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File

This PDF file was flagged by a machine learning classifier as malicious. It contains a large number of external links, many of which point to domains designed to mimic legitimate file hosting services, suggesting a link farm or SEO poisoning tactic. The document body, though partially corrupted, contains text related to 'commercial aviation safety 6th edition pdf free download', indicating a lure to trick users into downloading potentially malicious files from the numerous embedded URLs.

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://www.beacondenver.com/uploads/1/3/0/6/130640191/130640191.html#commercial+aviation+safety+6th+edition+pdf+free+download
    • http://zanmilafwa.net/uploads/1/3/1/0/131070791/7456022.pdf
    • http://mister5foot18.com/uploads/1/3/0/8/130814235/menusinijobax-mapovev-vabupaza.pdf
    • http://ifuckingloveearth.com/uploads/1/3/0/8/130814065/1931993.pdf
    • http://www.dimeafrica.com/uploads/1/3/0/8/130874565/nejewipo.pdf
    • http://soovinchoi.com/uploads/1/3/0/6/130603954/nokaperiwesaza_labujopo.pdf
    • http://xpressonline.info/uploads/1/3/0/5/130544321/vowes_bodisetasa_bixeva_towexojow.pdf
    • http://ondeckfunding.net/uploads/1/3/0/5/130544136/wiwipotovir.pdf
    • http://loveandadog.net/uploads/1/3/0/6/130621176/gipetejofi.pdf
    • http://miningwithfriends.net/uploads/1/3/0/5/130588987/5fd3f0.pdf
    • http://poetrycult.com/uploads/1/3/0/7/130738657/dutizirakavakimema.pdf
    • http://tokypar.com/uploads/1/3/0/6/130604833/zumewi.pdf
    • http://europeanclayroofing.com/uploads/1/3/0/5/130590481/7473681.pdf
    • http://hostmaster.role.uk.com/uploads/1/3/0/2/130272579/1927599.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_off0000789c.bin
7f9bd39e094a9f01222be2fa5e39bcd2a4760f1b2f1cfe429222405f1bd20e3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x789C 7936 bytes

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