Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3de04872da227f6…

MALICIOUS

PDF

77.6 KB Created: 2021-03-27 15:47:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 9dbaca2f9c39e193c68c9b4868a91617 SHA-1: 298dcf62d7e6dd624442b6de30be43e9669d79b3 SHA-256: e3de04872da227f6cbc09ac4a2b930070230d8770f6f3b361cc927f8b3931a52
244 Risk Score

Malware Insights

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

The PDF document contains numerous links designed to redirect users to external websites, as indicated by the PDF_SEO_LINK_FARM and PDF_MALICIOUS_REDIRECTOR_LINK heuristics. The ClamAV detection and ML classifier further support its malicious nature. The primary lure appears to be a 'free iPhone giveaway', a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://yafferge.ru/wix?keyword=free+iphone+8+giveaway+2020 In PDF document text
    • https://felezawobo.weebly.com/uploads/1/3/4/8/134896203/2286735.pdfIn PDF document text
    • https://dunifavopugi.weebly.com/uploads/1/3/5/3/135312205/gigozexi-rekaka.pdfIn PDF document text
    • http://1xbet-sportstavki.fun/3210832937163yp3.pdfIn PDF document text
    • http://raisinshub.pro/10667659332harc5.pdfIn PDF document text
    • https://sijetuso.weebly.com/uploads/1/3/4/4/134499475/rajemajepokinap.pdfIn PDF document text
    • http://mamajan.space/71110366556a50cb.pdfIn PDF document text
    • https://mukuriwubi.weebly.com/uploads/1/3/1/4/131483253/puwilekizokifi.pdfIn PDF document text
    • https://cdn.sqhk.co/zapajugadira/cOgjLha/zumexofivuvipa.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxozowaki/geghifX/private_ice_hockey_lessons_near_me.pdfIn PDF document text
    • http://interbankdigital.com/average_household_income_in_india_20190gb2s.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/woxotopapozokev/gateway_b2_workbook_answer_key_unit_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6d44c49-6e89-494f-91a4-eda00bef995e/36189288334.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9dc821a-0f8a-4aa5-ba90-b46bf68963cb/hp_laserjet_p2035n_offline.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/78464690018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1886df9-1d24-4b01-99ad-a7e5dae50f40/lucent_english_grammar_book_for_competitive_exams_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b352b8f-606e-44d3-8f79-53199675d763/un_curso_de_milagros_audio_en_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2215b26a-5cf1-441e-a657-5c55555aed94/dell_inspiron_2350_power_cord.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/1996_honda_vt1100c2_shadow_ace.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b180cad8-f876-4374-b65f-f09731dd0e13/71927151287.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/753fd9f4-9be6-424e-8f1f-ed9326b97d25/11159392411.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/54288092531.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_off0000eee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE9 5548 bytes
SHA-256: 1a78bb2e47a6c6cb4204bdfb6ef9bdbe37218072e941a9622682731e03aee95c
font_01_sfnt_off000101e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E4 11104 bytes
SHA-256: eac5d498106e9860f39c37d1728dbe40d82cf202bffce3df30d04899e337cf9d