Malicious PDF — malware analysis report

Static analysis result for SHA-256 afe0c04aab558eed…

MALICIOUS

PDF

45.4 KB Created: 2020-03-29 07:28:50 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2cac0d1c990c4d584b6eef929c96bd88 SHA-1: 0b66239c10272d3e7985e4b738b2081014e02046 SHA-256: afe0c04aab558eeda1de996b07b149ba9443e410c20c0b8772a13477ef3f3a5c
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links to other PDF files hosted across various domains. This behavior is indicative of a link farm or SEO manipulation tactic, potentially used to distribute malware or engage in phishing. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent. No scripts were extracted, and the document body was largely unreadable, but the presence of numerous external links is the primary indicator of malicious activity.

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://riversidecountyhistory.org/uploads/1/3/0/7/130775231/130775231.html#love+rosie+ending+story
    • http://www.coachpairing.net/uploads/1/3/0/7/130776138/pakitalefix.pdf
    • http://101sarah.com/uploads/1/3/0/6/130621317/c03ed79ed74ad8.pdf
    • http://sacredhealingtools.com/uploads/1/3/0/6/130639489/xigisale_tener.pdf
    • http://paperowlpress.com/uploads/1/3/0/5/130552017/daredikopo.pdf
    • http://mta-sts.mx.charlesriboli.com/uploads/1/3/0/5/130588289/rajiz.pdf
    • http://funmotionsoccer.com/uploads/1/3/0/7/130776017/2680909.pdf
    • http://dfpinvestments.com/uploads/1/3/0/7/130776877/3034656.pdf
    • http://collectxt.com/uploads/1/3/0/2/130289345/vixejepuboketilejek.pdf
    • http://nightowlcraftery.com/uploads/1/3/0/4/130476322/5490284.pdf
    • http://americantraditioncarpentry.com/uploads/1/3/0/3/130379353/7092752.pdf
    • http://davenportwrites.com/uploads/1/3/0/2/130272361/6220220.pdf
    • http://angrypixieimagery.com/uploads/1/3/0/7/130776328/198598.pdf
    • http://thriftwit.com/uploads/1/3/0/6/130621443/lepenubenog.pdf
    • http://eoin-odowd.com/uploads/1/3/1/3/131379578/lokupetulurolenaxov.pdf
    • http://www.jamesehret.com/uploads/1/3/0/6/130621299/kukoludu_fizeredesadig_sifexugoniwaz.pdf
    • http://nubeginningfarm.com/uploads/1/3/1/0/131070227/6150879.pdf
    • http://heartofthemountainscenter.com/uploads/1/3/0/5/130590698/nodujekaligageb.pdf
    • http://www.bakingwiththebear.com.au/uploads/1/3/0/5/130588395/bde16.pdf
    • http://www.maya.plus/uploads/1/3/0/6/130639946/7221584.pdf
    • http://www.sarahsheppardsart.com/uploads/1/3/0/8/130874084/lavaselotejitizuxo.pdf
    • http://theyoublog.com/uploads/1/3/0/6/130620854/sozamevubamise.pdf
    • http://renewalleave.com/uploads/1/3/0/8/130813483/9e2ab3b.pdf
    • http://accademiale5sinergie.com/uploads/1/3/0/6/130620679/3486703.pdf
    • http://toycorner123.com/uploads/1/3/1/0/131070043/27ac6b37d.pdf
    • http://chefgeorgina.com/uploads/1/3/0/9/130969700/bowefawidid.pdf
    • http://chefgeorgina.com/uploads/1/3/0/9/13
    • 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_off0000888c.bin
a7edd2a2c2c8a5aa845ae8278656da83d34f99044dc6058ce605d6e6bd2e26df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x888C 8196 bytes

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