Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0ce7e59faacc8bd…

MALICIOUS

PDF

80.0 KB Created: 2021-03-07 00:49:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 02171c5ca32de50c1fac23949a34159a SHA-1: bee75c56a06fda9fa80cc22102d9c92a29efa96d SHA-256: d0ce7e59faacc8bd4eddc0b364db7caed179e4b01f546d0b9f8ba703e9e83493
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded URLs and the heuristic firings for PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM point to a campaign that leverages SEO techniques to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/wix?keyword=capital+letter+no+worksheet+for+class+1 PDF link annotation
    • https://pagevexositikul.weebly.com/uploads/1/3/5/3/135327712/ranenidaf-wafekuvar-tifajogunomode.pdfIn PDF document text
    • https://gudemulu.weebly.com/uploads/1/3/4/3/134387893/dcc25b43a5798.pdfIn PDF document text
    • http://prizinsta24.site/papavurixemuzagefisasave2chdp.pdfIn PDF document text
    • https://kesevaze.weebly.com/uploads/1/3/1/3/131383297/4996792.pdfIn PDF document text
    • http://hookup757.fun/xulimenuvepaak48a.pdfIn PDF document text
    • http://bellissimo.online/dogamiwevuraneneferuzd83pf.pdfIn PDF document text
    • http://nunobuzipame.medianewsonline.com/tenergy_universal_smart_charger_blinking_red.pdfIn PDF document text
    • http://padlamadla.site/gowuguxie4hq1.pdfIn PDF document text
    • http://siwosupegejolop.medianewsonline.com/the_crown_on_your_head_text.pdfIn PDF document text
    • https://gefererasixo.weebly.com/uploads/1/3/4/7/134749514/lasefifububonu.pdfIn PDF document text
    • http://maslovauto.ru/32899879149nze42.pdfIn PDF document text
    • https://tenosufude.weebly.com/uploads/1/3/1/4/131455069/bonabotexubowuxiwi.pdfIn PDF document text
    • https://buliduxefexefux.weebly.com/uploads/1/3/1/6/131636978/fosowejotozigek.pdfIn PDF document text
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/jafodema-lexigad-nososunerop.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/pirofopafu/xoselitumepozababimis.pdfIn PDF document text
    • http://zuputes.atwebpages.com/38282020847.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/88032662921.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d983bfac-bbe4-481f-b58b-2c35bec48ad3/how_to_set_up_roku_on_magnavox_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5734ae8-67e3-431d-bfa4-82bceecef2d3/ms_project_2010_full_tutorial_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/check_if_codesigned.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/badudulexakamej.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC84 5216 bytes
SHA-256: 384a6c9825c975d4020fdabb96dfcffb91d845af43b64d4032e8ffe453f3cd5c
font_01_sfnt_off00010e53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E53 10664 bytes
SHA-256: 56209c9c91872eb0c9d939b57c7bf57b574c8e813ba2f95e56a18389bd51e86c

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