Malicious PDF — malware analysis report

Static analysis result for SHA-256 61d6a35eca30ffaf…

MALICIOUS

PDF

74.0 KB Created: 2021-02-23 18:03:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 558de3da31dc7d448a111bd7de811959 SHA-1: a943f38cd4fa56b0336935dd7fada1273ec578f7 SHA-256: 61d6a35eca30ffafe69634b5522c0e88b3a99c1590fe28940f6e1a2397052b6f
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an external URI and an image lure pointing to a redirector URL, suggesting a phishing or malware distribution attempt. Although no scripts were extracted, the presence of embedded URLs and the nature of the heuristics indicate a likely attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://druttle.ru/123?utm_term=ap+calculus+ab+allowed+calculators PDF link annotation
    • http://hihikane.space/best_lens_for_canon_rebel_t5iauh3y.pdfIn PDF document text
    • http://vseti.life/40762085894rga90.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481825/normal_600217ebd0393.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466161/normal_5fde5d8f236ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428341/normal_5fecfec0e7987.pdfIn PDF document text
    • http://eurofamily.pro/how_to_fold_up_a_total_gym_supra_proz7ne1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420776/normal_5fd620e4cbd26.pdfIn PDF document text
    • http://white-x.fun/punubuwerelufekusubeu94m6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489615/normal_5ff7ab34cc962.pdfIn PDF document text
    • http://buzifun.22web.org/brts_road_vijayawada_full_form.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493195/normal_5fca6ceab32e1.pdfIn PDF document text
    • http://goodsun.space/nails_salon_in_mall_of_america96git.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423137/normal_602c4a0e071df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379045/normal_5fdc66e20629f.pdfIn PDF document text
    • http://seomagnat1.online/guild_wars_2_crafting_guide_0-_40076utv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://lexawelezalum.epizy.com/31269872319.pdfIn PDF document text
    • http://vizumun.rf.gd/broadcast_receiver_not_working_android.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD679 5016 bytes
SHA-256: 964c4304465331716abb4160451fda65a60af4c0a18ec0fb2f2d76dc47e43ea0
font_01_sfnt_off0000e79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79D 10904 bytes
SHA-256: 78cad4cbe08ed214a80a676683b2b9243ad40209719c6a6955cf673407e51ae4
font_02_sfnt_off00010caf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CAF 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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