Malicious PDF — malware analysis report

Static analysis result for SHA-256 79b8643dcf7ddf66…

MALICIOUS

PDF

65.9 KB Created: 2020-12-16 14:11:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 24e086f26d8221c4f5730a27c4206f36 SHA-1: 7a0b98bee6f5c058bb0a72e55d09e15d442b2acf SHA-256: 79b8643dcf7ddf66317762a08b6c8665b912c75fec1c8c98fcda95ec3feb7a16
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though partially corrupted, suggests a lure related to an 'environmental science study guide answer key'. No scripts were extracted, but the presence of embedded URIs and the overall detection profile strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffset.ru/123?utm_term=holt+mcdougal+environmental+science+study+guide+answer+key+chapter+7 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408989/normal_5fcdf1f8573e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370302/normal_5fc5439f91db7.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/a977685e-1b33-4450-861d-dd3f81d0e8e6/84593240939.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc3fbbe2-eab5-45eb-8180-8cbdfa6b4a3a/true_result_meter_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc18b4cdf132613bbc250a7/t/5fc7e72ace39e91cd396ff1c/1606936363476/smart_goals_acronym_pe.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/pamowepukasakenawik.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4fbdee5c7695ca9b5b589/t/5fc806c2a6b98126320e8fd3/1606944451084/cyber_hunter_lite_apk_data.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/109d6bdf-1a27-474a-8c34-7d77ae761677/lesson_1_extra_practice_ratios_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29042d26ff1194f7e5c4d/t/5fc9799c93b4dc627b5733f3/1607039391914/alien_space_jump_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e54cc9e0-9601-4355-9f54-d0517cc84ea3/77703217718.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0b633d26ff1194f72bba3/t/5fcf9aa0faf0bc04d1d2cd8a/1607441057276/olympics_2020_postponed_which_country.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51ddefcd-36a3-4695-8622-135148f7c1fa/readworks_casey_at_the_bat_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f23fe2d-aec8-4c61-8a86-b53b28a4acf2/dulusigofuvize.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/40830670910.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5fc9a3f-20bb-4912-865e-b1d0fe9ee794/dasiwuzebi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad77b089-dff2-40ed-991d-a94b006abadc/vikuvadakelote.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_off0000c251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC251 5844 bytes
SHA-256: 25dd1116567465f2ebed32194f8c25b1bcba999a8353f4d07b7dea7318b4f9c0
font_01_sfnt_off0000d62c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD62C 10528 bytes
SHA-256: 02f4146c6703e370456da3495fcc24a45fc25d30de727dcff4de6499a6aae37b

Open this report in the interactive analyzer, or submit your own file for analysis.