Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce4a47710bd3e0b4…

MALICIOUS

PDF

68.2 KB Created: 2021-06-08 07:50:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 08f628085f70dcca93644333cb654f6c SHA-1: 688a1f6b9b109a28269b12c83706006c4cb7932e SHA-256: ce4a47710bd3e0b4823ec5d5b9c9af4717bfafbe35e13bff09ab4bd1e20c2b94
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojanized document. It contains numerous external links, with a significant number pointing to PDF files, suggesting a link farm or redirection mechanism. The document body, though partially corrupted, contains text related to a "Peppered moth survey lab answer key", likely a lure to encourage users to click the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://drafthe.ru/pbw?utm_term=peppered+moth+survey+lab+answer+key PDF link annotation
    • https://jifalefowa.weebly.com/uploads/1/3/4/7/134733665/4669798.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369926/normal_5fd09cc280519.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454673/normal_5fe890909aabd.pdfIn PDF document text
    • https://waluxine.weebly.com/uploads/1/3/4/7/134759732/61b1cbddec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464874/normal_60233374d26b0.pdfIn PDF document text
    • https://kupubasurunasoz.weebly.com/uploads/1/3/4/6/134695217/cf690fb3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366381/normal_6007789b2b9df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376374/normal_602c50c8ba158.pdfIn PDF document text
    • https://dojukigefob.weebly.com/uploads/1/3/4/5/134577696/1221752.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445745/normal_6049cb6cdc748.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390641/normal_6023875dd0a25.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/1c1e9590-220f-4931-8bc5-c8830c8f44f4/77280887980.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e8de0c1-2e2c-48b9-8b09-de04f184e268/tuzawibagakunifosopela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b12490a3-7816-455b-8b6c-9df338270af0/31664106190.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1250c061-dc40-4e2d-b440-707e71965afc/what_are_the_different_types_of_psychological_assessments.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed63c1bc-1669-4fc1-be9b-eb92a309b819/babelikikigexufewiwobus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9f4abc0-94b0-46eb-aa5f-c70dc0add310/kuwaligevaxof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de424a37-f7d1-4542-95c2-a4475acb271f/whirlpool_gold_dishwasher_troubleshooting_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc1cc94d-79cd-4cc2-8720-897b5cea6257/71655429410.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7baa1791-9205-4887-a1b4-b857c8a3c659/fearless_taylor_swift_lyrics_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fce7f4f7-4227-4cb7-a524-bec9fd005d55/wafedemarifam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ec7d4f6-cd67-443b-9b1d-450bb7874953/bivovisexomikusapuxuz.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_off0000ce8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE8A 5656 bytes
SHA-256: 26c660cdd42bce4bd44b446a345977d5397582ecf8d02eb4c71de8f59ce3f857
font_01_sfnt_off0000e1ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AE 9868 bytes
SHA-256: a7b2c39020a2d900b85872dea384959dd0aa6955e32c97849f7cc7620ea491b7

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