Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5514796f3cad0ce…

MALICIOUS

PDF

52.8 KB Created: 2020-05-15 23:56:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31bb523340f52138ed231073567065fd SHA-1: 25fc731a36205e6c71a1af93291312848b880581 SHA-256: c5514796f3cad0ce6290df3cb70e6f66a48554474c818de33f84b180e451c4a5
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and URLs, including 'http://dearcharlytravel.com/uploads/1/3/0/6/130604161/130604161.html#dbt+emotion+regulation+worksheets+free', which is likely part of the lure. The primary goal appears to be directing users to a network of potentially malicious or spam-hosting websites.

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://dearcharlytravel.com/uploads/1/3/0/6/130604161/130604161.html#dbt+emotion+regulation+worksheets+free
    • http://prayformyfamily.com/uploads/1/3/0/3/130379596/46bb0ce6a3ed.pdf
    • http://musicationlabel.com/uploads/1/3/0/7/130775470/bf9ce93b.pdf
    • http://trenchninja.com/uploads/1/3/0/6/130621481/panomidotuturi.pdf
    • http://kingtaculargetaways.com/uploads/1/3/0/5/130550951/sitakipabotu-vubotuz.pdf
    • http://ceciliabramhall.com/uploads/1/3/0/6/130639791/rasonuwosebuvi_xagagaxuxizo_tedof_rijemox.pdf
    • http://islnd.store/uploads/1/3/0/5/130551112/wedikanevezomojumi.pdf
    • http://therapycenterofnewyork.com/uploads/1/3/0/4/130475981/67c39951d3f47.pdf
    • http://mozzafiatoia.com/uploads/1/3/0/7/130738963/ef40e1.pdf
    • http://splashesofpaint.com/uploads/1/3/1/4/131452947/mekik.pdf
    • http://thegoodlifestylez.com/uploads/1/3/1/4/131408086/gajokifude_gamapaf_bilapipobosotuk_jusati.pdf
    • http://pennyharris.net/uploads/1/3/0/6/130604393/xilur.pdf
    • http://mikeleespeaker.com/uploads/1/3/0/7/130775135/27f43a885b682.pdf
    • http://tatertotatthechase.com/uploads/1/3/0/7/130775776/zatezetaxufad.pdf
    • http://studiodalodeamcis.com/uploads/1/3/0/5/130589123/didozojewizerag_lagotuvojo_lezawimadujebab.pdf
    • http://reconmetal.ca/uploads/1/3/0/9/130968915/d97f6b.pdf
    • http://plantabejas.com/uploads/1/3/0/8/130813934/b2a5959de2d3b.pdf
    • http://encounterednetwork.org/uploads/1/3/0/7/130776070/kowujol.pdf
    • http://feedtheneedy.net/uploads/1/3/1/3/131381411/ba6bf11.pdf
    • http://motionfuels-arkansas.com/uploads/1/3/1/6/131636862/5511792.pdf
    • http://creativeconsultingsolutions.org/uploads/1/3/0/8/130814227/3e46c.pdf
    • http://duncansimms.com/uploads/1/3/1/4/131408062/026aa4.pdf
    • http://saltkingsclothing.com/uploads/1/3/0/2/130273748/povoselamirorinamako.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_off0000a1a0.bin
8d97e7f319613acebd356ee44b1a714041d8e630c002bf5df7d6270f43c0812a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1A0 10980 bytes

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