Malicious PDF — malware analysis report

Static analysis result for SHA-256 24040f6052f47580…

MALICIOUS

PDF

90.9 KB Created: 2021-03-15 06:11:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4cf8b8c79591b36a5716c1b2033623f SHA-1: b85055587d448803007485315f3d8eedbfa21cd9 SHA-256: 24040f6052f47580f97b15ea8a8b3dd8b61064b56194da2631716868657ec533
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. The PDF contains a large number of external links, with one pointing to 'https://botokaw.ru/strik?utm_term=the+house+on+mango+street+novel+study', suggesting a lure to a malicious site. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, further supporting the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=the+house+on+mango+street+novel+study
    • http://doctora.club/89528475044dvov5.pdf
    • https://kirimobo.weebly.com/uploads/1/3/1/0/131069812/1e0b885f011.pdf
    • http://tokexal.medianewsonline.com/example_of_approach_avoidance_conflict_in_psychology.pdf
    • https://jedexapotup.weebly.com/uploads/1/3/4/4/134472831/sakotewivasu_gubarabageku_notebito_tojaginuju.pdf
    • http://neuroncraft.online/941393282382cx32.pdf
    • http://sellforce.ru/buwogevesemodubavirnoxdn.pdf
    • http://xakaderinetatu.mygamesonline.org/vutinanumeworibonakud.pdf
    • http://genoray.pro/wokugum5eepl.pdf
    • http://osmosiotzs.fun/pebble_watch_20195czm9.pdf
    • https://vuwadano.weebly.com/uploads/1/3/4/3/134350870/7432996.pdf
    • https://tulivugid.weebly.com/uploads/1/3/4/6/134607321/4425662.pdf
    • http://sarawavenudiwap.mygamesonline.org/jk_bank_exam_syllabus_2020.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://punotonaduwize.atwebpages.com/16838081283.pdf
    • https://uploads.strikinglycdn.com/files/5e7eb3e0-72c2-46c7-831f-64a8d662a8a9/sozow.pdf
    • https://uploads.strikinglycdn.com/files/77a03151-6543-44fd-80a6-c5ab956b4ae5/jusitemasivogitikiliwomab.pdf
    • https://uploads.strikinglycdn.com/files/6e95eeb0-7199-4599-9675-284a533d9d43/22786376317.pdf
    • http://fuluxewamotate.atwebpages.com/rufigixajexepuwew.pdf
    • https://s3.amazonaws.com/fowonaxul/boletin_informativo_afp_u_onp.pdf
    • https://uploads.strikinglycdn.com/files/54f0eee8-cb19-4d63-968c-05ffbc8861c4/martial_arts_classes_for_adults_near_me.pdf
    • https://uploads.strikinglycdn.com/files/5a57ac0a-ea60-44c4-9386-bc584242e614/bugera_v22_mods.pdf
    • https://uploads.strikinglycdn.com/files/a9b6448c-2a0a-470c-9716-901dd22345cc/wood_carving_merit_badge_worksheet.pdf
    • https://s3.amazonaws.com/bejikefowu/canon_eos_rebel_t3i_user_manual.pdf
    • https://uploads.strikinglycdn.com/files/65bb4168-4432-48fd-a9fc-4a2bbb9b790b/case_for_faith_table_of_contents.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012463.bin
35e07f26dcf0c300d92ca7e6375df2398e032634b9bbf12da3aff7f3990e1119		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12463 5352 bytes
font_01_sfnt_off00013673.bin
86f341e5bcb1d74d8e04ad4b5580f6380ec57d8998a363679329487b8595563c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13673 11740 bytes

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