Malicious PDF — malware analysis report

Static analysis result for SHA-256 a423958394e1e6f6…

MALICIOUS

PDF

111.1 KB Created: 2021-03-20 02:21:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f29e1a07ebfb1a8e5e901f76a4b163f6 SHA-1: 92e7ea6667aa2143348a5d0f4a0b6fbe82d5070b SHA-256: a423958394e1e6f6b05e4c979e44508a730dec0d93a42944fcbf64bdabe5f7f2
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xezojetit.ru/strik?utm_term=rosemount+3051s+manual PDF link annotation
    • https://cdn.sqhk.co/fazejitev/nidhdgf/pocket_city_free.pdfIn PDF document text
    • https://cdn.sqhk.co/veludewozen/hbigEER/joaquin_phoenix_news_twitter.pdfIn PDF document text
    • http://shopbest.online/what_is_plt.legenddtiyn.pdfIn PDF document text
    • https://nemerode.weebly.com/uploads/1/3/0/7/130775229/zojiw.pdfIn PDF document text
    • http://unlockdeals.shop/736143290928m4y6.pdfIn PDF document text
    • https://seruvukajobal.weebly.com/uploads/1/3/4/4/134479042/e8fcb.pdfIn PDF document text
    • http://moscow-siberian-force.online/mcquay_microtech_ii_operation_manualiuf33.pdfIn PDF document text
    • https://getazepamotiga.weebly.com/uploads/1/3/4/3/134352900/2348803.pdfIn PDF document text
    • https://vixikubinimagap.weebly.com/uploads/1/3/3/9/133997110/dulorolul-pubuwupetujigi-kunakeku.pdfIn PDF document text
    • https://begazasageb.weebly.com/uploads/1/3/1/6/131637419/9385235.pdfIn PDF document text
    • https://vogaxuruxav.weebly.com/uploads/1/3/4/3/134352923/8286673.pdfIn PDF document text
    • https://nodopotol.weebly.com/uploads/1/3/4/0/134018708/9689015.pdfIn PDF document text
    • http://flowerport.shop/pejazopozijatosekisnxa34.pdfIn PDF document text
    • https://vemetufubejukat.weebly.com/uploads/1/3/4/3/134367776/buralezom.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/883dc288-5a07-4a2c-ac8e-79fe9a1d20f3/guvomodegitageluderot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec61a704-962b-4135-8a7b-270b88f10cd3/which_came_first_bible_or_gilgamesh.pdfIn PDF document text
    • https://c1bbde11-5cda-4f7c-8b74-b2fe90b484f5.filesusr.com/ugd/1c8c6c_251789316d0c4748a3147d19a9b49438.pdf?index=trueIn PDF document text
    • https://979cd01f-16ea-4d2c-b189-234964c95597.filesusr.com/ugd/d4c4cf_2911289c4cc14f218b527bbb20877214.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5873cd30-306c-4175-8793-3c8e63ca5d8c/74914771685.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16603 3516 bytes
SHA-256: 6cd2a82b403e523931efff7ab294766f9bef4f9ef361436e2403eb1163edb705
font_01_sfnt_off000172a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172A0 5224 bytes
SHA-256: bc448108606bbb812ad6eae7716a4bad5da880a0a895f368c10e4b11ee8813ba
font_02_sfnt_off0001845d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1845D 12324 bytes
SHA-256: fd8707c8c0071d44098143802c94bcdcc1b5661d5311fe96338ce76e708cbb9a

Open this report in the interactive analyzer, or submit your own file for analysis.