Malicious PDF — malware analysis report

Static analysis result for SHA-256 08e5854a872cd19b…

MALICIOUS

PDF

37.1 KB Created: 2020-03-26 10:18:51 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2c3fe4fa6a8671ab2fc89040d5677908 SHA-1: 40111c7968403832a57ed0f19f1e1198f349dcae SHA-256: 08e5854a872cd19b466f6700c927ae89dcc0ba9e9ccb7c7f6112551da2515b70
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the presence of numerous external URIs suggests an attempt to distribute or host further malicious content. No scripts were extracted, limiting the analysis of direct execution vectors.

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://kelbels.org/uploads/1/3/0/7/130774962/130774962.html#campo+magnetico+generato+da+una+spira+formula
    • http://thetastingplace.co.uk/uploads/1/3/0/8/130874025/3728514.pdf
    • http://opportunityrecords.net/uploads/1/3/0/5/130552084/jivezetab-vorutogodena-puribalelutugax.pdf
    • http://deadturnip.com/uploads/1/3/0/6/130604693/gijix.pdf
    • http://www.pccpnetwork.nhs.uk/uploads/1/3/0/4/130435546/f8a194.pdf
    • http://doraslodge.com/uploads/1/3/0/3/130379336/edca0680.pdf
    • http://platesofhope.com/uploads/1/3/0/3/130323811/7980146.pdf
    • http://climb2fly.com/uploads/1/3/0/5/130590058/vibovekadozis.pdf
    • http://mx.eidia.com/uploads/1/3/0/7/130739351/53d386851c6ed9.pdf
    • http://hostmaster.tobulaakimirka.lt/uploads/1/3/0/4/130476098/widomokujefox.pdf
    • http://catalystmovementtherapy.com/uploads/1/3/0/6/130604104/rurusegom-kotafakevama.pdf
    • http://www.muscletensionrelief.com/uploads/1/3/0/7/130739661/71040.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_off0000658b.bin
1215c3ad430d0847a359c17c87ba3e97f8f70de264d146e41f87af0ceb3928b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x658B 9212 bytes

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