Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e62a1424d542e8d…

MALICIOUS

PDF

82.7 KB Created: 2021-03-15 03:19:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 93c623b7a687632733ec8b85711c789e SHA-1: b318f1368ba31aa5c3dd1db359ac9ffd6bc20da8 SHA-256: 4e62a1424d542e8de13facbec73401febba1638f9fff0272498ee81cb2c32b43
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 a phishing trojan by ClamAV and ML classifiers. It contains an embedded URL that redirects to a domain associated with phishing, likely intended to lure users with a search query about TV issues. The PDF structure and embedded URI point towards a phishing attack leveraging a common user query.

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://fokemale.ru/strik?utm_term=why+do+i+have+sound+and+no+picture+on+my+tv PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489593/normal_604de2fbb3b8b.pdfIn PDF document text
    • http://heliusdesign.ru/rebonejufofuvabopogevo730bt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413473/normal_6002e8c7c95e2.pdfIn PDF document text
    • http://penageli.getenjoyment.net/kuger.pdfIn PDF document text
    • http://luziniwanemek.sportsontheweb.net/what_can_a_kindle_fire_10_do.pdfIn PDF document text
    • http://itclick.pro/how_much_is_the_rarest_50p_worthphtf2.pdfIn PDF document text
    • http://mozejewij.iblogger.org/evaluative_reading_comprehension_test_online_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449793/normal_600df15027b7f.pdfIn PDF document text
    • http://leririv.sportsontheweb.net/givamigevuxe.pdfIn PDF document text
    • http://islandlandscapesbb.com/pabuxobumemi95g6q.pdfIn PDF document text
    • http://mavigawika.scienceontheweb.net/19324788407.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486350/normal_601c71447f03d.pdfIn PDF document text
    • http://xulodol.mygamesonline.org/23198421537.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zewixezix.epizy.com/sirius_starmate_8_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/29370054347.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/vojibafojo.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/chandrayaan_2_details_information.pdfIn PDF document text
    • http://goterarok.rf.gd/what_caliber_is_ruger_mini_14_ranch_rifle.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/94761333003.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_off000104ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AB 5456 bytes
SHA-256: a636b6c825572384f2cd5247a040b6070f67eabb9bedbb70c6fc202fe6573369
font_01_sfnt_off00011729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11729 11636 bytes
SHA-256: e4f75e5729a63762ea2da014c2a14b1a38a85413d8a46da692cd2b1892091c3e

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