Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c767b690026fb3f…

MALICIOUS

PDF

33.3 KB Created: 2020-03-12 12:56:49 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 653ead9584e647e950c76812fa57740d SHA-1: d7edb1752071f922653c06caf8f7af5bdd8168bd SHA-256: 7c767b690026fb3fe79011e5cedc67a2a4aab123288bd449b43aaf6d9192141f
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are structured as SEO link farms, suggesting a malicious intent to distribute further content. The document body also contains a URL that impersonates a free Adobe Reader download, likely as a lure to trick users into clicking on malicious links. The ML classifier strongly flagged this PDF as malicious.

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://allamericandogexpo.com/uploads/1/3/0/7/130775746/130775746.html#adobe+reader+free+download+for+windows+vista
    • http://www.hotelfenix.org/uploads/1/3/0/6/130621596/katepogitonale.pdf
    • http://allisonkalloo.com/uploads/1/3/0/5/130545784/kufesebujuropexodaz.pdf
    • http://amandlastenberg.com/uploads/1/3/0/7/130740342/fexisezuxidupa.pdf
    • http://allsd.co.nz/uploads/1/3/0/6/130621298/fubuwatup_giwawefav.pdf
    • http://343westfranklin.com/uploads/1/3/0/7/130740045/12c11208a4356.pdf
    • http://www.multilanguagebox.com/uploads/1/3/0/7/130775252/regudunojetekit.pdf
    • http://bergeronjeepreviews.com/uploads/1/3/0/6/130640239/f8c963c.pdf
    • http://865qipaidaojugoumaishangcheng.f18.ebkf.org/uploads/1/3/0/7/130776245/japume.pdf
    • http://reparaton.net/uploads/1/3/0/4/130476122/vekogexeviwo_domudep.pdf
    • http://smsawani.com/uploads/1/3/0/6/130639583/negar_zixovenevi_kapik.pdf
    • http://www.shopwildflowercottage.com/uploads/1/3/0/7/130740250/gidifiraj.pdf
    • http://www.dasbikehaus.com/uploads/1/3/0/3/130313086/niwutijuravirizo.pdf
    • http://lisannevanaert.nl/uploads/1/3/0/2/130291352/vamabibedij.pdf
    • http://brianmoquin.com/uploads/1/3/0/2/130289663/385333.pdf
    • http://breadandbuttertogo.com/uploads/1/3/0/3/130379158/febivodofege.pdf
    • http://adamselementarygear.com/uploads/1/3/0/5/130541661/ragekexasuf_vixas_bijufoka.pdf
    • http://bhmapothecary.com/uploads/1/3/0/5/130543840/pezokiduremuzenefik.pdf
    • http://brideable.com/uploads/1/3/0/6/130639603/1403990.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_off00005aad.bin
f30d8d84efe591bbe98ad45a95a07af6026961e4a4397ce3d6753035a8276222		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AAD 6860 bytes

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