Malicious PDF — malware analysis report

Static analysis result for SHA-256 088d8442d57d0557…

MALICIOUS

PDF

67.8 KB Created: 2020-11-16 17:12:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 40048b2f35e06db1e68d329a483ef310 SHA-1: dea3a396484bceedaceddd2e33287c984b953e54 SHA-256: 088d8442d57d0557db48e8bc26d83836e8873d0a6fd342fc2ed47dfcf00df5c9
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics strongly indicate malicious intent. The embedded URLs, such as 'https://traffking.ru/aws?utm_term=texas+boater+education+exam+answers', likely serve as entry points for further malicious activity, such as phishing or malware delivery.

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://traffking.ru/aws?utm_term=texas+boater+education+exam+answers PDF link annotation
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/dulefipalep_jobowajoxugo_wiribulelom_nuzigo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444374/normal_5fab92de25e82.pdfIn PDF document text
    • https://sigodujirole.weebly.com/uploads/1/3/4/3/134319969/d519a8a12e597.pdfIn PDF document text
    • https://jebezefekoju.weebly.com/uploads/1/3/4/7/134737834/7266108.pdfIn PDF document text
    • https://dutajidadu.weebly.com/uploads/1/3/4/7/134730474/tizedeniluxiz-gefowigujotubu-senunomikale.pdfIn PDF document text
    • https://dikoriwapajok.weebly.com/uploads/1/3/4/4/134447187/8237394.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381321/normal_5f99229628a58.pdfIn 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/0e7f406a-1d64-478d-aa8f-22b5dec489dd/husson_google_site.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/kevomopezaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88334e81-93ac-4f65-80ed-5092abd1f389/ap_human_geography_barrons_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9b8206f-e70a-4c66-a12c-90bf9414567d/sujedo.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/vision_ias_ancient_history_printed_notes.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF95 5300 bytes
SHA-256: d35be9b51e65a2d825138a2875d83dd11900ee00b9538119863feecbb39424e4
font_01_sfnt_off0000d190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD190 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off0000dcf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF3 10496 bytes
SHA-256: baba221ba24cc822021875d652812fd3e1b0015d3407e512ac687afcbee87ab0

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