Malicious PDF — malware analysis report

Static analysis result for SHA-256 33260e3cdc46c7ad…

MALICIOUS

PDF

88.7 KB Created: 2021-05-06 02:06:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a70e6f53a265b978eae81942fb956aab SHA-1: 6290eb2f499d04e9e7af11ae782de3ab6dde1569 SHA-256: 33260e3cdc46c7ad126178e1dfec705d7356b59f2178f41b2e9f430e0d61b940
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, identified as a link farm. The primary URL points to a page discussing how to wear a mask, which is likely a lure to disguise the malicious intent. The presence of numerous external links suggests an attempt to manipulate search engine results or redirect users to potentially malicious content. No scripts were extracted, but the PDF structure and link farm heuristic indicate a phishing or SEO spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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.
  • 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://jumiwimov.ru/strik?utm_term=how+to+wear+a+mask+and+not+steam+up+your+glasses PDF link annotation
    • http://matrixbicycles.com/bitiya_rani_song_by_sureshvv3gr.pdfIn PDF document text
    • https://banafovogakake.weebly.com/uploads/1/3/5/3/135326552/440f272acd692f4.pdfIn PDF document text
    • https://cdn.sqhk.co/sofizagumup/Dhd2Eeq/thai_alphabet_flashcards.pdfIn PDF document text
    • https://wijuluberaselak.weebly.com/uploads/1/3/4/0/134016921/fobewilomevog-fubibutir-kukejogixa-tomuluz.pdfIn PDF document text
    • https://tererenigi.weebly.com/uploads/1/3/1/4/131405956/3967026.pdfIn PDF document text
    • https://ferafavobob.weebly.com/uploads/1/3/4/6/134671558/7749396.pdfIn PDF document text
    • https://vizedaxitexoter.weebly.com/uploads/1/3/4/7/134740617/sodumidaxepuzex-dezexike-fesuto.pdfIn PDF document text
    • http://curvepreloved.com/let_us_come_boldly_unto_the_throne_room_of_graceziwxh.pdfIn PDF document text
    • https://cdn.sqhk.co/rifokinimito/jgVeiha/zanexifisulox.pdfIn PDF document text
    • http://idem-peshkom.ru/bypass_proxy_android_mobilexwfie.pdfIn PDF document text
    • http://purpless.vip/lazonulamoje1p46z.pdfIn PDF document text
    • https://cdn.sqhk.co/belerudoxej/higfhjQ/xukenusetitafu.pdfIn PDF document text
    • https://kovakaxidaxid.weebly.com/uploads/1/3/5/3/135322813/509726.pdfIn PDF document text
    • http://groby-ritual.online/1099542203px0fd.pdfIn PDF document text
    • https://tusezewepoxir.weebly.com/uploads/1/3/4/3/134339989/ede33.pdfIn PDF document text
    • https://gafepidata.weebly.com/uploads/1/3/0/7/130776025/gukerekema.pdfIn PDF document text
    • https://mateboxabivof.weebly.com/uploads/1/3/4/7/134763458/f4a44.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://ed4d48c2-14ea-47f5-a89a-b82193587323.filesusr.com/ugd/8ce377_6034a2f44f7d4e53ac7b764a36c084c1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nowokil/center_radius_form_from_graph.pdfIn PDF document text
    • https://aabf49e0-5477-4fd2-8456-a986ef8f2a87.filesusr.com/ugd/9e14ca_93f974635ebc4f6db25cc83d3176da58.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/21098390122.pdfIn PDF document text
    • https://856cb5e6-6c81-45ce-9604-b57907a15cd2.filesusr.com/ugd/cc3ca9_4451a1e527ff47ef94cf9f6d33a804eb.pdf?index=trueIn PDF document text
    • https://24a70dd4-b549-4b9e-9c0a-6eea45ab85ad.filesusr.com/ugd/ab0c63_bfbe6758d5644cac87ba99a986840028.pdf?index=trueIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F2 5332 bytes
SHA-256: 581dcc9dd1098e444ce3721d9b6932ed4c7917b427c1678c5b32e1f026d048db
font_01_sfnt_off00011507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11507 2424 bytes
SHA-256: 2a8164ef99d4ac08ec695bedeb2e15ef85337d5b9083721bb579665dcffe7c9c
font_02_sfnt_off00011fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAC 11456 bytes
SHA-256: 0d8bfa48e3fa94876ca5dfde7cc52be8b7f4cb955b3a6030562c0471bace340a
font_03_sfnt_off000146a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146A3 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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