Malicious PDF — malware analysis report

Static analysis result for SHA-256 782b0c87d8b5a576…

MALICIOUS

PDF

67.6 KB Created: 2021-02-03 02:44:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: c9b256102ac3065730b530bdaa40bf0d SHA-1: 13748fefa160ddd087e3a261514ba339233d1490 SHA-256: 782b0c87d8b5a5766bd68c93746709c21d3576399486f27edf5b4920ea338614
242 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of embedded links, many of which point to disposable domains and appear to be part of a link farm. One critical heuristic indicates these links lead to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9904

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/aws?utm_term=food+for+thought+questions+and+answers In PDF document text
    • https://viwuwobigoku.weebly.com/uploads/1/3/1/3/131378942/rarojisosojudaj_wowivisefi_rusedal.pdfIn PDF document text
    • https://cdn.sqhk.co/difigobon/4hijcL5/incarnation_environment_meaning.pdfIn PDF document text
    • https://xaxibilezulaf.weebly.com/uploads/1/3/4/0/134096047/gabojegok_dozejubale.pdfIn PDF document text
    • https://cdn.sqhk.co/wedegetuso/eOhbidU/nfl_cardboard_cutouts_price.pdfIn PDF document text
    • https://cdn.sqhk.co/danajuva/jjifmjd/unseen_messages_facebook_iphone.pdfIn PDF document text
    • http://shop-onlain.fun/totally_accurate_battle_simulator_free_download_apk_pculuut.pdfIn PDF document text
    • http://smartcoin.design/ripivoxunuvikejigixuz879n.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/fK3gitv/guxipobadogazakuwux.pdfIn PDF document text
    • https://cdn.sqhk.co/xolovagi/ihgjjgO/19758026793.pdfIn PDF document text
    • https://wibugosavuzatug.weebly.com/uploads/1/3/4/3/134349607/1641862.pdfIn PDF document text
    • http://podipotekoi.ru/sozokuvewawetelezatapesjnt4o.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/i7wijji/befogaziwikudite.pdfIn PDF document text
    • https://doruxajowivabog.weebly.com/uploads/1/3/4/8/134870444/pufowunof-kurara.pdfIn PDF document text
    • http://xrootunited.com/38639941963apb4m.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/19519165412.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/zofexejamonagigo.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/african_dwarf_frog_care_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/asphalt_8_cheat_engine.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/traduo_batman_arkham_asylum_pc.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AA 5308 bytes
SHA-256: 5ae8ebcafddd2f617336c636756d3dd3a096dc4f4df31b47cfd15168fc1c4609
font_01_sfnt_off0000ebc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC1 10852 bytes
SHA-256: c34bb7d5b471be35af4fb94e10818df90d0735f50d73ce86a3d500d548e0daad

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