Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ba54e5261ab8d6…

MALICIOUS

PDF

77.1 KB Created: 2021-03-16 07:36:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c92fbd171a5ec679806b116b46de0548 SHA-1: b5a17fbd98c423b555c6aa0f186bb51b88dedc69 SHA-256: 05ba54e5261ab8d6bcb0f2652516c93f77950fc3eac7b1ed85898518c258d819
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains a high-severity heuristic firing indicating it is an SEO redirector for phishing, luring users with a fake download. The primary IOC is the malicious URL used in the redirector. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely involving exploitation or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://xajibur.ru/wix?keyword=act+testing+dates+2020+near+me PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479254/normal_60236acaa5f3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446507/normal_6041c26d91265.pdfIn PDF document text
    • http://busimaderule.mywebcommunity.org/triboar_map_storm_kings_thunder.pdfIn PDF document text
    • http://delozofize.scienceontheweb.net/botany_syllabus_for_ias.pdfIn PDF document text
    • http://vipadobotisituz.mygamesonline.org/taruwakegofepezopisoniwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485807/normal_602069e597638.pdfIn PDF document text
    • http://zovitidagawas.sportsontheweb.net/23790002811.pdfIn PDF document text
    • http://disozire.mygamesonline.org/wofidifisez.pdfIn PDF document text
    • http://godotobekof.scienceontheweb.net/how_do_you_fix_a_noisy_samsung_refrigerator_fan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388824/normal_6022915e600e4.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/tazopaju/zezavitopanubamirerup.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/choices_modded_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/goodreads_apk_mirror.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/22877423645.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/84354286725.pdfIn PDF document text
    • https://s3.amazonaws.com/dogevazapiwediw/woluz.pdfIn PDF document text
    • http://wesatume.atwebpages.com/john_grisham_celebrity_net_worth.pdfIn PDF document text
    • http://kuxoxokazutuv.myartsonline.com/az_203_book_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/hp_laserjet_2100_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/mamalisikevejo.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/indian_constitution_original_book.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_off0000ee50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE50 5488 bytes
SHA-256: b4ed7d8cdc30c98c7a1fa98d489c713ca45962f01ad6ebe061770a15e02612b0
font_01_sfnt_off000100e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E6 11040 bytes
SHA-256: ebf48078231d38218283e63d45577a580119cffd94664d8daee40a2de4f97a67

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