Malicious PDF — malware analysis report

Static analysis result for SHA-256 82471ce2f488883b…

MALICIOUS

PDF

151.3 KB Created: 2020-11-18 18:07:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ebb2a893409a5a38d0a5c9b3ea69039c SHA-1: 1f5c31a511b53271b0b4f1813866dae121744751 SHA-256: 82471ce2f488883b6179794a59bd6ee9214fada064258c5d59aead6fcaa86e8b
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/123?utm_term=sony+dcr-sx41+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4410988/normal_5fa0534bd0935.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427097/normal_5f9d84384855f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f86f941d03f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381108/normal_5fa08c73cf5dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379726/normal_5fa00fdd79b64.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.orgThisIn PDF document text
    • http://www.fontrix.comhttp://www.nhncorp.comIn PDF document text
    • https://s3.amazonaws.com/tadovu/84212433754.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/88343825389.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3370c4e8-f780-4962-8baa-16915d993f10/pagevemabesetutifuvivaz.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/words_that_start_with_rock.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/612ba025-c280-4085-950b-dd76f5c91c7e/vldb_2020_dblp.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/natekobobawizelase.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/39862886732.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/java_programming_tutorial_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/967aba3a-b736-4d8a-ba16-e14ba69dbae4/84006161415.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/85794453448.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
    • http://scripts.sil.org/In PDF document text
    • http://scripts.sil.org/OFLAbyssinicaIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b7ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B7CE 5532 bytes
SHA-256: 47fa0fccb3426ac312a1e2f7bd3a49fec35517072f3db4a418ec485bb3458642
font_01_sfnt_off0001caa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CAA4 23688 bytes
SHA-256: 4ab2852397b826172ee3b7c2b3296ffdb5823b4a1317a4919ada7a5f6bc8668b
font_02_sfnt_off0001f28e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F28E 7212 bytes
SHA-256: 2e9c62edd503bb2440d9ac77a0c2969b3bfee7d0e576699a34a3feb595f46842
font_03_sfnt_off00020904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20904 11024 bytes
SHA-256: c87935fd65dd646fab387ef254a847bf40f2c11f0a7822d16810661963fa34a3
font_04_sfnt_off00022e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22E7A 11796 bytes
SHA-256: bb990c7c55b46b4927a6634924123573ed0df1cfb7c346761bc3682d5cfd6f7e

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