Malicious PDF — malware analysis report

Static analysis result for SHA-256 915c95b9d6ff0542…

MALICIOUS

PDF

40.8 KB Created: 2020-03-26 04:02:05 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a27474ece4945ee2c5f75292392aaef6 SHA-1: 2cfd18b628641e7467fc2d9166294aa4134db33e SHA-256: 915c95b9d6ff05422f8e749133794656a6e3e8ce53977575f050f23d28e2be77
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: 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 PDF files with numeric slugs, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs, 'http://my-pet-blog.com/uploads/1/3/0/5/130543663/130543663.html#the+position+of+adverbs+and+adverbial+phrases+exercises+pdf', is also present in the document body. The primary purpose appears to be directing users to a network of potentially malicious or deceptive websites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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
  • 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://my-pet-blog.com/uploads/1/3/0/5/130543663/130543663.html#the+position+of+adverbs+and+adverbial+phrases+exercises+pdf
    • http://woodlandparkrecycling.com/uploads/1/3/0/7/130775244/mekosekofebifon-sadukobu-ravedataxigur.pdf
    • http://becomingbuchheim.com/uploads/1/3/0/7/130739393/nafulaza.pdf
    • http://www.mixbotanicals.com/uploads/1/3/0/7/130738836/cc5cfedb.pdf
    • http://magicaladventurestravelbystacy.com/uploads/1/3/0/7/130776561/nikovadato-matoxop-woposowogewitu-vetazujugigisu.pdf
    • http://mentok.net/uploads/1/3/0/7/130775014/3677864.pdf
    • http://vngc007uninimbus.com/uploads/1/3/0/9/130969315/7407a0814e.pdf
    • http://www.bethechangenw.org/uploads/1/3/0/6/130604924/8407999.pdf
    • http://simplyperfectnutrition.com/uploads/1/3/0/7/130739508/1121640.pdf
    • http://www.hitchcockhealth.com/uploads/1/3/0/6/130639530/safapuxakafipo.pdf
    • http://botoxformenatlanta.com/uploads/1/3/0/5/130541443/pedexe.pdf
    • http://www.thesweetestmoments.com/uploads/1/3/0/6/130604248/6858667.pdf
    • http://hostmaster.sahgb.org.uk/uploads/1/3/0/2/130272890/02fc2cef9344.pdf
    • http://www.cleanandthrive.com/uploads/1/3/0/5/130589371/wilutagusut.pdf
    • http://sim-analytics.com/uploads/1/3/0/6/130639539/nuvitoxafirul.pdf
    • http://enlinea03.en-linea.com/uploads/1/3/0/8/130814731/zaxexezuge.pdf
    • http://julesjourneys.net/uploads/1/3/0/5/130551391/407094.pdf
    • http://cranecrews.com/uploads/1/3/0/3/130313612/bfcc0ae9e53f074.pdf
    • http://hmh-cpa.com/uploads/1/3/0/2/130287299/2433948.pdf
    • http://motherwrenstudio.com/uploads/1/3/0/8/130813651/9605927.pdf
    • http://patelforiowa.com/uploads/1/3/0/6/130639886/2972499.pdf
    • http://slaughterhouseadventure.com/uploads/1/3/0/6/130639681/9891d2038.pdf
    • http://truecorners.com/uploads/1/3/0/2/130289686/3922900.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_off0000771f.bin
cca87873906a6c5cbc3a2d38e7a63daafd95f162451259b333bff4ad65a1c5e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x771F 7632 bytes

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