Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e2809fb04f7a07c…

MALICIOUS

PDF

42.2 KB Created: 2020-03-11 14:13:46 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c7106116b666b6198c2da91987f8a906 SHA-1: 19104edd56f3029579f9d311b67958c365287292 SHA-256: 7e2809fb04f7a07c337a684ee76e09c589feffa602699331127e65d3ddd1db92
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The document body, though malformed, contains references to URLs that are part of this link farm. The primary attack pattern appears to be SEO manipulation or a link distribution scheme, potentially leading to malicious content hosted on the linked domains.

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.purejoys.com/uploads/1/3/0/5/130539936/130539936.html#reading+sheets+for+3rd+graders
    • http://ellenleventry.com/uploads/1/3/0/8/130874197/dokika_xetasuwinugako_bepakonotolemig.pdf
    • http://multifaithstorytelling.org/uploads/1/3/0/6/130621167/jikomadupavupaluwu.pdf
    • http://tristamalexander.com/uploads/1/3/0/3/130313783/rudetu-mesawiwenego-lodotaloj.pdf
    • http://rlconstructionwa.com/uploads/1/3/0/5/130545957/balakogimutiw_risopobupodan_sogobeso.pdf
    • http://www.thelittlefarmnz.com/uploads/1/3/0/4/130488387/a7fc414b0.pdf
    • http://michaelanthonyshairanskin.com/uploads/1/3/0/7/130776068/rovalujanov-fixajuwi.pdf
    • http://calisthenicsonline.com/uploads/1/3/0/5/130541209/2978674.pdf
    • http://www.shopmantrajewelry.com/uploads/1/3/1/0/131070846/vejurafiteb-jamupur-mujatasozejem-zonivozejumanav.pdf
    • http://sideoftheroad.life/uploads/1/3/0/6/130640020/d731e2c4c6bb6.pdf
    • http://ovospitanii.site/uploads/1/3/0/5/130550948/8194928.pdf
    • http://www.beastedart.com/uploads/1/3/0/6/130620971/wepoxulokovuti.pdf
    • http://www.midhudsoncpr.com/uploads/1/3/0/2/130288458/kujemozofugikob_jokexi.pdf
    • http://12ster.com/uploads/1/3/0/6/130621516/pukove-vekivapipus-gagaf.pdf
    • http://allberta.com/uploads/1/3/0/3/130313440/ledivib.pdf
    • http://tribelicious.com/uploads/1/3/0/4/130476563/442115.pdf
    • http://badbananaclothing.com/uploads/1/3/0/7/130776716/9fe861570af.pdf
    • http://audiopron.com/uploads/1/3/0/2/130288761/ec06cc2dd931fb.pdf
    • http://www.chinainvestco.com/uploads/1/3/0/4/130483322/bezakawuvuv.pdf
    • http://speerinteractive.com/uploads/1/3/0/4/130435646/jotan.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_off00007bd9.bin
725ea9aefc7a71e0772e54967e7f857000c7331c47bb46baf7e6a66e3169ae1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD9 8140 bytes

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