Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7ce20a04ea2e4c9…

MALICIOUS

PDF

71.3 KB Created: 2021-01-12 01:11:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1a6bbdd5c2f12bacc3c589094a2a7117 SHA-1: e230530ef271773ad611962589a46fac2cde3b0a SHA-256: e7ce20a04ea2e4c9f3d70cae6db50c6e700b73e4ea6c54a8a51fc160afdf48a6
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, appears to be a lure related to a 'planting guide'. No scripts were extracted, but the PDF structure and link farm behavior are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/aws?utm_term=kinnikinnick+planting+guide PDF link annotation
    • https://cdn.sqhk.co/tubafejog/wicjeMC/color_fill_3d_game_download.pdfIn PDF document text
    • https://nawuwisenaz.weebly.com/uploads/1/3/5/3/135318134/8441911.pdfIn PDF document text
    • https://tusosalowikos.weebly.com/uploads/1/3/1/4/131453146/tubinune-xisil-kawaletekilonu-rovalakemejide.pdfIn PDF document text
    • https://tofudilasikota.weebly.com/uploads/1/3/0/9/130969343/tozopejir.pdfIn PDF document text
    • https://jojusilinu.weebly.com/uploads/1/3/4/3/134343509/naritakejego-madotusigokever.pdfIn PDF document text
    • https://jijemelagif.weebly.com/uploads/1/3/4/0/134016961/46f1dc.pdfIn PDF document text
    • https://cdn.sqhk.co/fazovivum/OShiThd/kedapen.pdfIn PDF document text
    • https://lirurarupo.weebly.com/uploads/1/3/4/7/134770738/ximanijidigezo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415308/normal_5fa05755cfe72.pdfIn PDF document text
    • https://fejufawos.weebly.com/uploads/1/3/4/3/134328201/45826c3a0f0cb88.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/dobesogum/pijadeginil.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/cnil_bpi_guide_rgpd.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_off0000dc04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC04 5000 bytes
SHA-256: 88dd8668efed8fcff063cd481086a07b44f420d31fd82b11628f29f88943347a
font_01_sfnt_off0000ed1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1E 10276 bytes
SHA-256: f78a5f742de6ded3143b65aec45b31c9b001b61753180679d50464346aa33387

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