Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5f6ce1ea3340a78…

MALICIOUS

PDF

100.4 KB Created: 2021-03-23 11:15:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 726c987ccb985e8b3f262e881dd71ea7 SHA-1: ef0e85b238c02953d109c6b3a7ce57e41aeea4e3 SHA-256: e5f6ce1ea3340a78a9fe62cba98845af6eb5a166fca7a7bf0b1bf74de2441e41
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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.
  • 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://lozipotod.ru/strik?utm_term=audio+technica+lp120+usb+turntable+review PDF link annotation
    • https://cdn.sqhk.co/sobetevod/agdZBXE/pedonusowemasebipufalipil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446030/normal_605022dd9f55b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468812/normal_6005b7258f57e.pdfIn PDF document text
    • http://price-list.moscow/cartoon_video_editor_appgusa2.pdfIn PDF document text
    • http://rimka.xyz/pixel_experience_rom_poco_f1_android_10a7fks.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482860/normal_5ffda0ff786b3.pdfIn PDF document text
    • https://cdn.sqhk.co/firavibaw/jd3hfjc/how_do_you_spell_street_cred.pdfIn PDF document text
    • https://cdn.sqhk.co/sojetaji/AhcPhjM/jewopikesuzukiwuwi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423772/normal_6032b3a0d7e0a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371005/normal_5fd0824b9fea0.pdfIn PDF document text
    • http://wirelessinfo.ru/14060846785j9696.pdfIn PDF document text
    • http://natnat.fun/suzevadosojggxa9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vutogebufuz.myartsonline.com/weguxikasagapopekamuzara.pdfIn PDF document text
    • http://zerowegujij.onlinewebshop.net/43527883215.pdfIn PDF document text
    • https://ba3a7bb5-edd2-4228-b29c-cf272df6a868.filesusr.com/ugd/bd1c09_fbf5298bb2a948728f1f16348dee6caa.pdf?index=trueIn PDF document text
    • https://f7f2eb1f-4ce6-40bf-b337-6bcc2c9c1a95.filesusr.com/ugd/dc6899_413aec4ae8fd473dbe08b017a5728ab8.pdf?index=trueIn PDF document text
    • https://a6047d18-b57f-4fdc-88fa-dea7715a8642.filesusr.com/ugd/189347_aab011c7e4ed44929da6f84d13273dcd.pdf?index=trueIn PDF document text
    • https://8aefc570-8454-48c3-bb63-d4d1067b7ce0.filesusr.com/ugd/5c9621_a202d6126fd4447186093f1043594486.pdf?index=trueIn PDF document text
    • http://fijorolur.myartsonline.com/public_speaking_coaching_near_me.pdfIn PDF document text
    • https://1416a32c-f91c-4ec3-9c10-bfdf610c7df7.filesusr.com/ugd/76de1a_741a78488c6e4fa6ac7f80a62e852a92.pdf?index=trueIn PDF document text
    • https://69f1164a-dcd3-4310-9fb4-3b67f03bdbb0.filesusr.com/ugd/9d7282_39b3bf428a9d4775badf1782e505da82.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_off0001475c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1475C 5768 bytes
SHA-256: fc8ed51cf37e2ec39a87abc7852436618258caac5f8fa42f8e269b2ebd3057b9
font_01_sfnt_off00015b08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B08 11624 bytes
SHA-256: 0e4c86fbd50eebdf662844295a18feaac787577e939f6f3aee1375efc6f788f6

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