Malicious PDF — malware analysis report

Static analysis result for SHA-256 303def3fec1024dc…

MALICIOUS

PDF

78.3 KB Created: 2021-04-10 21:26:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 20bc29403f5ef4bbb7c5c12dc4a56caa SHA-1: 5228d8c90954597b2b9474e2e6b1053e711446d2 SHA-256: 303def3fec1024dcbd6bd172d8e7316cf9b359511b1b875ba5954e210f1fa396
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/strik?utm_term=in+the+heart+of+the+sea+novel+summary PDF link annotation
    • http://look-hotel.com/gigapugazeruzizojedury6hv.pdfIn PDF document text
    • http://honbiz.pro/how_to_use_ipega_controller_on_iphonecwd10.pdfIn PDF document text
    • http://probmake12.xyz/nezoranadakokiranudoudss.pdfIn PDF document text
    • https://cdn.sqhk.co/dosojegomugu/geLhfig/expert_option_apk.pdfIn PDF document text
    • http://muvariwiporiju.iblogger.org/uitzending_bijwonen_formule_1_cafe.pdfIn PDF document text
    • http://goodik.fun/amazon_web_services_bootcamp4a34f.pdfIn PDF document text
    • https://cdn.sqhk.co/zumufapofow/usxijms/empire_warriors_tower_defense_td_strategy_mod_apk.pdfIn PDF document text
    • http://wogizejelalod.iblogger.org/almug_icon_pack_mod_apk.pdfIn PDF document text
    • http://naturaleone.space/sciatic_nerve_pain_stretcheslib45.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://af0fe010-594a-4ec7-a26b-e2d78e33490d.filesusr.com/ugd/7d2910_6626d7b03c974071aa1f31d4afeb0742.pdf?index=trueIn PDF document text
    • https://f06ae689-34e6-4fd9-b749-a5985747e370.filesusr.com/ugd/4117a9_761618ea5b6e4f7d86c922f73d6f69e6.pdf?index=trueIn PDF document text
    • https://387a498e-9551-4239-9507-3183ba214552.filesusr.com/ugd/cd403b_90836d90b43349eb868c718aa5a1f9e9.pdf?index=trueIn PDF document text
    • https://0e818273-c791-4c7a-b20f-750474b78fe4.filesusr.com/ugd/362633_d63063e895f04a0387cd1bc5d82dc2ae.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/why_does_my_vizio_keep_turning_off_then_back_on.pdfIn PDF document text
    • http://fabodatutowew.epizy.com/66763691006.pdfIn PDF document text
    • http://dewuxad.rf.gd/24981484073.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/are_you_ready_in_spanish_formal.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/71041877214.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d4b02eb-c98b-4949-a34f-b601c05d5b67/how_to_turn_ringer_on_a_panasonic_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4fb6d74-5448-4fe5-b8cd-7e16db13330b/portland_1750_psi_pressure_washer_foam_cannon.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/15090256086.pdfIn PDF document text
    • https://4541bc1c-e35c-4de3-bb44-1f53c3e1a56d.filesusr.com/ugd/68f66e_8209ea7d800b4bd394b3fca4a34b3338.pdf?index=trueIn PDF document text
    • http://xupebina.epizy.com/28002104924.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/rujebetuwipidawebafi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cdac55a-9777-452d-ae05-80077623e57f/87870325700.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_off0000f29d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29D 5104 bytes
SHA-256: ffb2c8b7d2dc987215a246157c918245965ce710e75b2551661838edbaf0e9a0
font_01_sfnt_off000103e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E0 11224 bytes
SHA-256: 2b27381674d72724081af972b00abe30ebf329885224c159974c545b66cf8c21

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