Malicious PDF — malware analysis report

Static analysis result for SHA-256 30c1260adef101d0…

MALICIOUS

PDF

66.4 KB Created: 2021-02-12 14:43:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a8144888d7f51b8c00823485bf79d42 SHA-1: bcebe6956f278f5baf5e1e156497addaec65dd1f SHA-256: 30c1260adef101d0ff5ca4e1206402dc0bccb34b9af60765b3f34834e81a3d54
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, a common tactic for SEO link farms and phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious websites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://leonvi.ru/wix?keyword=american+chemical+society+organic+chemistry+study+guide
    • https://jakazopafekitab.weebly.com/uploads/1/3/4/6/134632018/wanujimodapo.pdf
    • http://tatalenusonivo.22web.org/70394584021.pdf
    • https://cdn.sqhk.co/jarogofef/fjfjgve/sumazatusow.pdf
    • https://posajegodat.weebly.com/uploads/1/3/4/4/134477503/devuxubobutizuk_sitipij_pidovox_veganobixewevu.pdf
    • https://mikatafa.weebly.com/uploads/1/3/1/3/131398449/6dc9e43ae.pdf
    • https://cdn.sqhk.co/fukonovum/fGgjspg/ttec_t_mobile.pdf
    • https://tesetugunujogub.weebly.com/uploads/1/3/4/0/134040467/7935008.pdf
    • https://sunutefe.weebly.com/uploads/1/3/5/3/135350425/fudurelilalera_kejexasa.pdf
    • https://jopuwijexanubuf.weebly.com/uploads/1/3/0/8/130874501/a9957d8.pdf
    • https://cdn.sqhk.co/disumuneriva/7rgghhR/58510635617.pdf
    • https://namadifudemabum.weebly.com/uploads/1/3/0/8/130813063/sukipesitem_jowud_tupiru_lezipabed.pdf
    • https://cdn.sqhk.co/mukibusu/bOuHjaL/city_racing_3d_2014_mod_apk.pdf
    • https://pugewolusaw.weebly.com/uploads/1/3/1/4/131453132/2288ab59f1a2.pdf
    • https://tisawisapapaw.weebly.com/uploads/1/3/5/3/135326074/dac0cc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zerujafulo.rf.gd/rimekerutodobila.pdf
    • http://fefisapuvekebi.epizy.com/57172267450.pdf
    • http://joxelugokolutu.rf.gd/parent_functions_and_transformations_video.pdf
    • https://s3.amazonaws.com/kegovev/mufunobiberilodeni.pdf
    • https://s3.amazonaws.com/fidefofudi/89860156668.pdf
    • https://s3.amazonaws.com/jazofi/navy_letter_format_template.pdf
    • https://s3.amazonaws.com/salosibejodod/vilotivafovotem.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6fe.bin
11b19cd2993be822e958b869fd569c5057b03b7f15c2851086d4cea1f433a928		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6FE 5444 bytes
font_01_sfnt_off0000d95d.bin
e6996c7a2f390f731486dbe441f7940db819f4ffb6cda69122fb705d6f51195a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD95D 10160 bytes

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