Malicious PDF — malware analysis report

Static analysis result for SHA-256 14edb5a665271d2e…

MALICIOUS

PDF

69.0 KB Created: 2021-05-25 13:44:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4d302ea3230fd665a3e90a5a204419e1 SHA-1: 7ed46859aa48fb78738ba29c98daea605c608282 SHA-256: 14edb5a665271d2e6e29ef9da3df24b4240531a08621af8fa1208f3868961ff3
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 identified as a phishing trojan. It contains an embedded URI and a heuristic firing for an SEO redirector link, both pointing to 'https://maypoin.ru/strik?utm_term=how+do+you+program+a+chamberlain+garage+remote'. This indicates a phishing attempt disguised as a free download, aiming to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/strik?utm_term=how+do+you+program+a+chamberlain+garage+remote PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4443602/normal_5fdcfee9845fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369316/normal_605f4cd3db8ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487916/normal_603423f959313.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368969/normal_601abb5a78b4e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474170/normal_5fd06433dd9f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492294/normal_5fd19865043f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426690/normal_605967e8bb2f9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8514f905-faef-435e-9220-98b761fa43ec/best_way_to_learn_python_for_beginners_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/measuring_adjacent_angles_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/phrasal_verbs_meaning_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/9455093669.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7aebcf6d-3094-4c3f-87b9-c25b089d1a59/vemimopu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/290731bc-027e-4143-8dc8-b6d5bb70f1f2/33473495806.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/good_interview_questions_to_ask_a_math_teacher.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/zepexisasozev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8fcf27c-3ab2-431b-ab13-38152a79a142/lista_de_exercicios_numeros_inteiros_7_ano.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/jumpsuit_outfit_ideas_winter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fbbe2d8-b463-468f-acbf-8f30c871d6bb/49261155477.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/nugibifufikerebo.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/vcredist_2012_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/music_player_android_project_report.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_off0000d18b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD18B 5604 bytes
SHA-256: 1b58ef1bc372b57b0a33dcbc95f2491c4585f315d2912470a93e692d33f615ad
font_01_sfnt_off0000e47e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47E 9984 bytes
SHA-256: d8d60f4aad30b16b9747fda1b206bb96de4aee5af0d54508b40c4c0153fd2836

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