Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0cce45d6d114bd2…

MALICIOUS

PDF

71.8 KB Created: 2021-02-24 03:36:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 8a370cb4c93db99ceeaebb14618ab869 SHA-1: 689622b5eebc4fbdaf9edce5ea73596ce21aedc5 SHA-256: b0cce45d6d114bd207c3fbf55f68dd512c08701b61a778b315d8e8469252d95c
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a lure related to watch battery replacement, which redirects to a suspicious URL. High-confidence ML and ClamAV detections indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded URI heuristics point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/123?utm_term=how+do+i+replace+the+battery+in+my+timex+watch PDF link annotation
    • https://cdn.sqhk.co/moromasi/ILlajfr/black_pit_hell_pixel_jumpers.pdfIn PDF document text
    • https://cdn.sqhk.co/ninubisidire/ZaKJjmz/95476297545.pdfIn PDF document text
    • https://cdn.sqhk.co/lijuwezasip/jaigH8I/54452025517.pdfIn PDF document text
    • https://cdn.sqhk.co/divojimo/OThgIon/strike_fighters_2_graphics_mod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501204/normal_602574b19796b.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/nIy9ghf/zaxetux.pdfIn PDF document text
    • https://cdn.sqhk.co/lorotukogof/d7e8QVk/ht_cable_size_calculation_chart.pdfIn PDF document text
    • https://cdn.sqhk.co/gufemazibafi/hgupPhb/84715414988.pdfIn PDF document text
    • https://cdn.sqhk.co/lipebefaje/hCgkihj/kevewadiwabifokeraze.pdfIn PDF document text
    • https://cdn.sqhk.co/vituxezij/jbhaZgg/gatofegatinefobelobu.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/safenalavojuwu/gutowazekajefovuro.pdfIn PDF document text
    • http://zumijuxuv.epizy.com/what_is_the_book_of_jasher_youtube.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/76296080276.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/ima_adpcm_codec.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/nature_of_feasible_report.pdfIn PDF document text
    • http://birofasadonu.epizy.com/fadugulominiwed.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/frequency_adverbs_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/blackberry_10_apps_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/92189041543.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/76545950478.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_off0000dbdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDD 5500 bytes
SHA-256: c875eb3a9a9ef074c04b773ccab05c16c8db3d2948bce37ee3f2399cc3e13333
font_01_sfnt_off0000ee76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE76 10436 bytes
SHA-256: 10434b51cb9818b931331a5a938eaa1d0c7561cc9775946971e86b05b8e0b9da

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