Malicious PDF — malware analysis report

Static analysis result for SHA-256 be7f516951b80b19…

MALICIOUS

PDF

169.0 KB Created: 2021-04-05 16:43:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 53f77108498a5cf3d32a0b46fb86b522 SHA-1: d9292dc9b83860473bd3374dff42d17b26fdd2e6 SHA-256: be7f516951b80b1932307b80133b36655795e570a81959519bbfb2975cdf0d5b
146 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document is identified as malicious by ML classifiers and ClamAV, and contains numerous external URLs. The document body, though heavily obfuscated, suggests a lure related to a 'bell schedule'. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to malicious content, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself is leveraged for the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://resalured.ru/wix?keyword=ehs.sau16.org+bell+schedule PDF link annotation
    • https://leluwimatuw.weebly.com/uploads/1/3/0/9/130969986/pivikote.pdfIn PDF document text
    • http://lamovingcompany.com/ruger_1022_parts_diagramv70pl.pdfIn PDF document text
    • https://cdn.sqhk.co/bulixanejad/bhgNCgg/27341892664.pdfIn PDF document text
    • https://cdn.sqhk.co/dugelabomaw/jgqLIjf/66336512569.pdfIn PDF document text
    • https://cdn.sqhk.co/pajazidif/Ijfmgdg/gogo_live_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/rigepasemapa/cogLidK/62944941949.pdfIn PDF document text
    • https://cdn.sqhk.co/zazifutunoj/jjdifja/lakitubivu.pdfIn PDF document text
    • https://tiwoboromezusud.weebly.com/uploads/1/3/0/8/130874009/fotudozarago_zegixop_favejiletu_zaromi.pdfIn PDF document text
    • https://tusuwijajibu.weebly.com/uploads/1/3/4/5/134517525/bovotasip_folutu.pdfIn PDF document text
    • http://discount50it.pro/72788201256as5cf.pdfIn PDF document text
    • http://fitokaps.xyz/bederozurolalumelaneje9mimm.pdfIn PDF document text
    • https://mawosamaretezij.weebly.com/uploads/1/3/4/8/134860838/818943.pdfIn PDF document text
    • https://cdn.sqhk.co/kopenanum/cZioahh/civics_and_economics_sol_study_packet_answers.pdfIn PDF document text
    • https://kavosimodo.weebly.com/uploads/1/3/4/9/134901779/da90893aae861.pdfIn PDF document text
    • http://art-practice.org/wapizuwulisugezawazubaxork7v0x.pdfIn PDF document text
    • https://cdn.sqhk.co/kapideto/gia6ige/harbor_freight_electric_pressure_washer_hose.pdfIn PDF document text
    • http://cleaner360.shop/why_is_my_kindle_device_greyed_out_on_amazon323kq.pdfIn PDF document text
    • https://cdn.sqhk.co/fagiseregu/bhbyFgi/callaway_gardens_golf_reviews.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/3018f481-217c-4d1f-9a13-aab6815e195d/84006673368.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6350b04d-801c-4410-af28-21b291b1d707/how_much_is_a_hisense_32_inch_tv.pdfIn PDF document text
    • https://d38713d8-f9e0-49bf-8e72-3f46774ce551.filesusr.com/ugd/b3faf5_1a0681ea7a464aa7915c535ac8a0ff71.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/554cd196-8cae-4806-9819-d4667f49c585/how_to_do_a_search_on_ipad_email_address.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/104fb0fe-f744-419c-be02-6cbbad4d1f28/red_rising_pierce_brown_tv_series.pdfIn PDF document text
    • https://314a97e4-cc7b-499c-a999-42b15fb65c39.filesusr.com/ugd/fa4a73_66285737d9fd477ba028e568b50d56f9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/98c1f8b7-7d9f-4b97-b03c-b716290a3f6b/too_big_to_fail_banks_india_2020.pdfIn PDF document text
    • https://73f4d879-981c-49fe-abc7-520f36a14a84.filesusr.com/ugd/b77b08_7fc49ba1e58b421c8e03ede307b898f7.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00025bc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25BC1 5536 bytes
SHA-256: 5c4e692da9c2e691c770298cc3b36f12a368b2aa80bd542fefe2d25d9445148e
font_01_sfnt_off00026e93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26E93 11928 bytes
SHA-256: d67ae37f1340c761d068134926c3939c2c35bc09bac520164f82e3db0310280a

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