Malicious PDF — malware analysis report

Static analysis result for SHA-256 eed70a0221ec1619…

MALICIOUS

PDF

105.3 KB Created: 2021-05-01 11:36:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 6e4b7146538e73a0bd44b4644cc5f188 SHA-1: 282c5f92b154f9e5862dbf6ada26e0e768535f7f SHA-256: eed70a0221ec1619ab09f7e93d4311c6030bc60271e8cdfb1a1be28e6364a336
166 Risk Score

Malware Insights

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

This PDF file is classified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains multiple suspicious links, including one that is invisible and points to a domain associated with phishing lures. The document body, though heavily truncated and obfuscated, suggests a lure related to 'comics for 15 year olds', which is likely a pretext to encourage users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://ponafet.ru/strik?utm_term=best+comics+for+15+year+olds PDF link annotation
    • https://cdn.sqhk.co/lilapanorup/gcbEsjd/zuzagaxonaraluzofuxekivi.pdfIn PDF document text
    • http://dokukuke.mypressonline.com/libro_sobre_el_cerebro_humano.pdfIn PDF document text
    • https://cdn.sqhk.co/subogutaze/ab9vghj/piggy_wiggy_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451021/normal_5ff69f0d3ccd1.pdfIn PDF document text
    • http://loginwithfb.site/426880221703lfji.pdfIn PDF document text
    • http://ritual-venki.online/nabikagebowec0jw3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471082/normal_6050794f14d76.pdfIn PDF document text
    • https://cdn.sqhk.co/fivufotimad/ctggMif/draw_a_stickman_sketchbook.pdfIn PDF document text
    • http://it50disconto.info/7008093283149jwd.pdfIn PDF document text
    • http://bcpzon4segurabetaviabcp.com/feelings_esl_worksheetmiaxv.pdfIn PDF document text
    • http://matteset-spon.space/photive_m90_portable_waterproof_bluetooth_speakeri2gy6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://woranuganavot.myartsonline.com/simpson_ms61043_pressure_washer_reviews_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8a40f7e-1671-496a-adc3-ecd76f9ef69d/how_does_evolution_describe_the_origin_of_life.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c765ff3-97f3-434c-ad38-ad2b9e03760d/48681010938.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88313c0d-302d-40fe-b4ea-6876f351119d/introduction_to_business_law_kenya.pdfIn PDF document text
    • http://jidoxib.rf.gd/28568303105.pdfIn PDF document text
    • http://ziboporo.epizy.com/34748417818.pdfIn PDF document text
    • http://jovured.rf.gd/children_s_apperception_test.pdfIn PDF document text
    • http://lilivuxaja.rf.gd/android_auto_cars._co._za.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_off00015e38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E38 5492 bytes
SHA-256: 9fc78e740c1afd9b2f9a794473b6df91558fa2224b1b56f2eeec77b79c6cb8d6
font_01_sfnt_off000170e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170E2 11836 bytes
SHA-256: a63a5f797b2af4d6607ee52a469391f98769793ca4d5449d2da9e45adf592327

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