Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e3ad9683c659f58…

MALICIOUS

PDF

40.6 KB Created: 2020-04-12 14:13:55 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d2caab97cae2ed62f235810f9e1fee99 SHA-1: 4944e02b32be1231fd941e964873b139fc44db86 SHA-256: 8e3ad9683c659f5896c2fb35e2714227bc784f30a971e531b533c994b1296fd3
94 Risk Score

Malware Insights

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

This PDF document employs a link farm technique, embedding numerous external links to PDF files hosted on various domains. The primary lure appears to be a link disguised as a download for 'The Family Man series' in Hindi, suggesting a social engineering tactic to entice users to click through to potentially malicious content. The ML classifier strongly indicated maliciousness, supporting the observed link farm behavior.

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://djsacademy.com/uploads/1/3/0/6/130605493/130605493.html#the+family+man+series+download+in+hindi
    • http://coachjordanmyers.com/uploads/1/3/0/2/130271128/3442420.pdf
    • http://organizeubyallyne.com/uploads/1/3/1/4/131453745/mojujivamidanoz-sigifixidupub-vepamonajige.pdf
    • http://globalkeytrade.com/uploads/1/3/0/5/130538838/c9193c9d5b5.pdf
    • http://approachableworld.com/uploads/1/3/0/7/130738555/taker.pdf
    • http://acvcphilly.org/uploads/1/3/0/6/130604620/2730333.pdf
    • http://francoisetmimi.com/uploads/1/3/0/7/130775934/6710676.pdf
    • http://strawberrylovedesigns.com/uploads/1/3/1/1/131164124/sovew_zedaperi.pdf
    • http://dumpyourjunkremovals.com/uploads/1/3/0/4/130476492/busomikiwedowa_fupubedeno.pdf
    • http://vanwaplumbing.com/uploads/1/3/0/4/130489467/9655384.pdf
    • http://cbdoshkoshwisconsinhealth.com/uploads/1/3/0/8/130874150/kiroxix_bexawelufemeluk_ninata.pdf
    • http://winteraire.net/uploads/1/3/0/6/130604617/vogevadav.pdf
    • http://automationinstrumentation.org/uploads/1/3/0/5/130551091/mevivigozu.pdf
    • http://gatorspubtigard.com/uploads/1/3/0/6/130620926/duteke.pdf
    • http://simplyeb.com/uploads/1/3/0/2/130289551/rotidarite.pdf
    • http://dumpyourjunkremovals.com/uploads/1/3
    • 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_off000073cc.bin
f3e5b7e9228731f9e9bcc2a4f37df51d58d69609a9b3412be8cec70ff236d881		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73CC 9064 bytes

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