Malicious PDF — malware analysis report

Static analysis result for SHA-256 6284712880f5968e…

MALICIOUS

PDF

44.9 KB Created: 2020-03-25 05:01:41 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 64bf84100214442dfd47e86fbd4f1a41 SHA-1: b5f41f6a535f926913bb88d5289adf77e6748129 SHA-256: 6284712880f5968ea49b6b299223f74e3421521d00a1a32fea608be5ff2b172b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links to other PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The primary attack pattern appears to be SEO manipulation or the distribution of a large volume of content through a link farm, potentially to host malicious payloads or phishing pages.

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://officerethink.com/uploads/1/3/0/4/130476555/130476555.html#dictionary+of+english+nouns+and+adjectives
    • http://aliciakallen.com/uploads/1/3/0/2/130271185/9647322.pdf
    • http://scottsdalesegtour.com/uploads/1/3/0/5/130539446/59a7001bd88613.pdf
    • http://supernovainstitute.com/uploads/1/3/0/6/130603692/meremisid.pdf
    • http://lionelcallender.com/uploads/1/3/0/5/130550741/2348219.pdf
    • http://siskiyouespressotech.com/uploads/1/3/0/2/130287738/xagigezixad.pdf
    • http://www.allfordummies.com/uploads/1/3/0/2/130272353/2198440.pdf
    • http://mounthebronstem.com/uploads/1/3/0/7/130738543/811dc150ec6.pdf
    • http://bullyfreeyork.com/uploads/1/3/0/6/130605193/nenolebe_boworuwixiz.pdf
    • http://www.namastae.ca/uploads/1/3/0/9/130969999/4073272.pdf
    • http://plasticsurgerytest.northwesternmemorial.org/uploads/1/3/0/2/130289498/7861757.pdf
    • http://www.fairlopplaintimes.com/uploads/1/3/0/6/130639282/2432383.pdf
    • http://squareonehops.com/uploads/1/3/0/4/130483110/8ceb152.pdf
    • http://eternaagencies.com/uploads/1/3/0/9/130969448/xifepoluguzazeluf.pdf
    • http://godofbeads.com/uploads/1/3/0/4/130483956/volod.pdf
    • http://www.theretrofitmasters.com/uploads/1/3/0/5/130541661/wojuvo.pdf
    • http://catalog2buy.com/uploads/1/3/0/7/130739879/9510418.pdf
    • http://salesale.space/uploads/1/3/0/5/130589179/muzosedam-xusegamiv-tavuregupipivaz.pdf
    • http://www.carrotfieldchronicles.com/uploads/1/3/0/6/130621646/miluz-nogawakami.pdf
    • http://ishiro.com/uploads/1/3/0/4/130476262/fejukifiwegibap.pdf
    • http://kaylaskitchen.net/uploads/1/3/0/4/130488096/656b3.pdf
    • http://lifepointlearning.com/uploads/1/3/0/8/130874073/duwunemewagotifosa.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_off0000843c.bin
5cda04d5f0b44c9efe12eb6dff67493bd6315167487dbef3bcd7dfa980cc35e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x843C 8280 bytes

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