Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cf0c54fd224f56b…

MALICIOUS

PDF

43.8 KB Created: 2020-03-29 05:43:39 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1126e74dbe1e619d5ee41659acd381fa SHA-1: 9c7251c62643b5b80623295b1d1cc25291595614 SHA-256: 5cf0c54fd224f56bfa81057b078d3a090f62dbda1e54e79f99a5b934c9291a5c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, identified as a link farm. The ML classifier strongly suggests maliciousness, and the numerous links point to a potential distribution or SEO manipulation scheme. No scripts were extracted, limiting the analysis of direct execution capabilities.

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://lists.accordionapocalypse.com/uploads/1/3/1/4/131438500/131438500.html#ejercicios+de+razonamiento+logico+matematico+para+cuarto+grado
    • http://cherishedcreation.net/uploads/1/3/0/5/130550770/5f6a1f.pdf
    • http://todotodid.com/uploads/1/3/0/7/130738679/a4e9cf1b759d46.pdf
    • http://straleysolutions.com/uploads/1/3/0/7/130739158/fufofob-zefubusuxuj-kagelani-bimuxafogogexi.pdf
    • http://www.dekastanje.org/uploads/1/3/0/7/130740259/jajajif.pdf
    • http://www.dacsancanuoc.com/uploads/1/3/0/4/130483244/949561f0.pdf
    • http://www.riotechelevadores.com/uploads/1/3/0/3/130379504/jobow.pdf
    • http://ddswe.com/uploads/1/3/0/4/130488493/xilugigopux-vuxozito-xemexe.pdf
    • http://wolfcreekpottery.com/uploads/1/3/0/5/130552017/tetivofuxelaliw_juwiditis.pdf
    • http://145pebblebeachdrive.com/uploads/1/3/0/5/130543006/nunexitipowej.pdf
    • http://indivisiblesaintluciecounty.com/uploads/1/3/0/4/130435569/143fc2651.pdf
    • http://www.pcycpowerfleet.com/uploads/1/3/0/6/130621304/pumogalebenezo-dofizulerije-kawiniwavujoli.pdf
    • http://0-13-0-demo.octarinesec.com/uploads/1/3/1/0/131070971/fidajulat_vetafinapeku_dinugefizigol.pdf
    • http://ncmaf.com/uploads/1/3/0/2/130291531/zovimum.pdf
    • http://absolutefloorsllc.com/uploads/1/3/0/2/130271206/rawiwumudamuji.pdf
    • http://luckylucianorottweilers.com/uploads/1/3/0/5/130543280/vapefive.pdf
    • http://trolleybusflowers.com/uploads/1/3/0/5/130540208/4467128.pdf
    • http://alpinecoasterusa.com/uploads/1/3/1/3/131380973/bemefaxonegemanuzuv.pdf
    • http://youthdreambig.org/uploads/1/3/0/7/130776812/mavedefiju.pdf
    • http://ogrodzeniabetonoweslask.pl/uploads/1/3/0/6/130640078/narer_tiziwadoxajowaf.pdf
    • http://hydrangeatees.com/uploads/1/3/0/5/130550952/8149633.pdf
    • http://max-your-coin.com/uploads/1/3/1/0/131070109/5216977.pdf
    • http://cpanel.integritypump.com/uploads/1/3/0/6/130605166/filan_kalinevigitulo_dulamirimaviwax.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_off00007b26.bin
b704ed6190c6a4326fa85e5d84268238bd51321fa0e4e7015d05a0407b9292cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B26 10128 bytes

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