Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5ed70a157932508…

MALICIOUS

PDF

34.6 KB Created: 2020-06-01 23:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efe3baad7525c251eef242bf690c087b SHA-1: 382a1a7fc9e6e4fde47feb96dc829ba3baf9157a SHA-256: c5ed70a157932508a3e1e78a62b291ac80df0c460922c51db996e7faa8964e98
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique commonly used to create link farms for SEO manipulation or to host malicious content. The ML classifier strongly indicated maliciousness. The presence of numerous unknown reputation URLs suggests a high likelihood of redirection to malicious sites for phishing or malware delivery.

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://qzb12.brdge.org/uploads/1/3/1/3/131380052/131380052.html#skyrim+torture+mod
    • http://mail.bloomingfulbirths.co.uk/uploads/1/3/0/7/130740563/325ede1e14744f.pdf
    • http://webdisk.theemberon3rd.com/uploads/1/3/1/8/131871910/temisinivupixe.pdf
    • http://artisticceilingtiles.com/uploads/1/3/0/8/130874369/5b924dc3a6.pdf
    • http://heresb2uty.com/uploads/1/3/0/3/130313577/fewelivokeloxob_nofigu.pdf
    • http://terpislecollective.com/uploads/1/3/0/7/130740180/lonumitavi-vuvajufe-gisomu-xeludokizuxoxax.pdf
    • http://yournaturallybrightpatiocovers.com/uploads/1/3/0/6/130604935/3948322.pdf
    • http://kidsclubasia.com/uploads/1/3/0/5/130542982/6213679.pdf
    • http://alltheessentials.net/uploads/1/3/1/4/131455378/lotosa.pdf
    • http://productiveinstincts.com/uploads/1/3/1/4/131483234/5732871.pdf
    • http://qzb12.brdge.org/uploads/1/3/1/3/131380052/terms.html
    • http://qzb12.brdge.org/uploads/1/3/1/3/131380052/dmca.html
    • http://qzb12.brdge.org/uploads/1/3/1/3/131380052/policy.html
    • https://zosagadepug.files.wordpress.com/2020/05/pofefepi.pdf
    • https://pekakupesile.files.wordpress.com/2020/06/lezibaxinagefige.pdf
    • https://samudazekami.files.wordpress.com/2020/05/jatixe.pdf
    • https://fokafogamis.files.wordpress.com/2020/05/pusikigogik.pdf
    • https://zisiwemebix.files.wordpress.com/2020/05/45465661239.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_off00005d2b.bin
308e655302821c6c8784325df20d9108abb77fe15d636ebd36b272008802cedb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D2B 9792 bytes

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