Malicious PDF — malware analysis report

Static analysis result for SHA-256 adc88177bc811702…

MALICIOUS

PDF

88.2 KB Created: 2021-03-13 23:40:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: a6b3b0bc4d5b9d6994a03e562e821462 SHA-1: 314f5c4cd3239a62853ed810ed2e065d1c1523e1 SHA-256: adc88177bc811702c6a5cb782dc0ba87066ed33701f0b1f3f0d2ecd45a9b63ba
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan threat. It contains a large number of external links, with a critical heuristic identifying it as a PDF SEO link farm. The primary external URI observed is https://nipisod.ru/wix?keyword=oso+de+anteojos+ecuador, suggesting a potential lure for users interested in the keyword.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • 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://nipisod.ru/wix?keyword=oso+de+anteojos+ecuador PDF link annotation
    • https://nimifitirujaga.weebly.com/uploads/1/3/4/6/134693460/nanokopimidebilaw.pdfIn PDF document text
    • https://cdn.sqhk.co/wotinobeb/26jbBgd/nightwave_plaza_discord.pdfIn PDF document text
    • https://tizusetupo.weebly.com/uploads/1/3/1/6/131607013/tiwenizatizifok.pdfIn PDF document text
    • https://xikematevi.weebly.com/uploads/1/3/4/3/134392378/816716.pdfIn PDF document text
    • https://danikobunib.weebly.com/uploads/1/3/4/7/134755608/rigetapekug_zulusi_zegeboduw.pdfIn PDF document text
    • https://kuserivexujeza.weebly.com/uploads/1/3/4/3/134331384/ronepatifot_metenuve_jafuwabikurane.pdfIn PDF document text
    • https://vurovovi.weebly.com/uploads/1/3/4/0/134040995/3911755.pdfIn PDF document text
    • https://cdn.sqhk.co/rapowipijes/wvJ6rhi/97274237160.pdfIn PDF document text
    • https://ralirepiputup.weebly.com/uploads/1/3/4/8/134852471/petov.pdfIn PDF document text
    • https://cdn.sqhk.co/toxinize/igjb3jb/63277524472.pdfIn PDF document text
    • https://fuwamelewupo.weebly.com/uploads/1/3/4/1/134131589/9734010.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/remuv/serujotinoviwuxupun.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/29771837922.pdfIn PDF document text
    • https://9e9203d9-9f5b-42f2-a849-05e42d741f90.filesusr.com/ugd/3527d5_0d3c87ced6504187b7bc4e7037e00b8d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b841207-324a-447d-bdd8-f16148c2783d/73281716495.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/cognizant_technical_interview_questions_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/mv_agusta_f4_1078_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f557949c-3b66-471d-80f0-7d99e0e07333/sufoji.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/skyworth_android_tv_review_philippines.pdfIn PDF document text
    • https://27420876-d215-4860-9a72-f48db0d0c320.filesusr.com/ugd/4062c2_876f7ea4963f43adbe73667b9a46f1c8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/91192375-2a23-4eb4-b6da-ffc3a6597d80/7076955740.pdfIn PDF document text
    • https://4adff18d-dc39-4349-be2c-eeb12737f1cb.filesusr.com/ugd/9117e0_b436ab2774004d66afd4fcdd93c46f3d.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_off00011700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11700 5004 bytes
SHA-256: 85f2646a953578280603208df95126e25948fd5af5ea81509a6096f11cd9c862
font_01_sfnt_off00012812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12812 12896 bytes
SHA-256: d39ac212d78863c39c32612be2e7cb198f21dfb9cb7fbd159c7822fd09a25994

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