Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f9253174fcf62c…

MALICIOUS

PDF

45.5 KB Created: 2020-03-09 02:59:59 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: eacc306d6142b3bf7ce7fabfc2888729 SHA-1: f01c6e4db1c7ab702c4312de19609e3132a0d2a7 SHA-256: c2f9253174fcf62c9697ad7c0ce9b09cac82a6462eece8e5b7abb7c290371723
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains a large number of external links, many of which point to other PDF files hosted on various domains. The primary lure appears to be 'timber bird aviary plans', with one specific URL being http://74-123-78-167.mgwnet.com/uploads/1/3/0/4/130477110/130477110.html#timber+bird+aviary+plans. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic suggests a link farm or SEO poisoning tactic designed to drive traffic to potentially malicious content.

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://74-123-78-167.mgwnet.com/uploads/1/3/0/4/130477110/130477110.html#timber+bird+aviary+plans
    • http://cioga.com/uploads/1/3/0/4/130476135/5110126.pdf
    • http://lopetsfoods.com/uploads/1/3/0/5/130589274/7840549.pdf
    • http://kmuncamp.com/uploads/1/3/0/8/130814687/gefijotoda.pdf
    • http://pattimelfiphotography.com/uploads/1/3/0/9/130969338/5994601.pdf
    • http://www.doodlingfordays.com/uploads/1/3/0/8/130813141/f0218b21ddc366.pdf
    • http://www.assbtrade.com/uploads/1/3/0/6/130639743/suwazusegog_bidad.pdf
    • http://sqonecondos.com/uploads/1/3/0/5/130545447/fidemag-xavozinet.pdf
    • http://www.garberophotography.com/uploads/1/3/0/6/130620800/1034b67df8f4.pdf
    • http://thebelieversoutlet.com/uploads/1/3/0/7/130740340/22e19453a9d766.pdf
    • http://hostmaster.promotiewinkelssg.nl/uploads/1/3/0/5/130542991/naxubokuz.pdf
    • http://sbprocast.net/uploads/1/3/0/7/130775527/jebudobubejaviwabo.pdf
    • http://chanelspetboutique.com/uploads/1/3/0/4/130435658/3dc313e11b7e.pdf
    • http://ninjamindfulness.com/uploads/1/3/0/4/130483198/1843763.pdf
    • http://madtownsystems.com/uploads/1/3/0/7/130775231/5347402.pdf
    • http://skyhighpainting.ca/uploads/1/3/0/8/130813762/d7553f48c.pdf
    • http://romanticism55.com/uploads/1/3/0/7/130738680/1433091.pdf
    • http://mieldercarelaw.com/uploads/1/3/0/6/130604300/5304450.pdf
    • http://oceanviewsolanabeach.com/uploads/1/3/0/7/130739260/5133705.pdf
    • http://yourethicalwill.org/uploads/1/3/0/4/130476581/6861803.pdf
    • http://natashacorriephotography.com/uploads/1/3/0/5/130540714/niselerowi.pdf
    • http://www.hiddenkindness.org/uploads/1/3/0/7/130775104/1942424.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_off0000883f.bin
08e18ca882c3e95f5af797d7422f67f951073596813d2f398769a29036e37182		 pdf-font-stream PDF embedded font (sfnt) at offset 0x883F 8392 bytes

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