Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebac109294546ff8…

MALICIOUS

PDF

123.2 KB Created: 2021-03-20 01:13:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f2b610594570bd78dcd4128b948ad130 SHA-1: 99ad35ad494edf35fa93e8b0e0cb1777ae35ef04 SHA-256: ebac109294546ff874fc9b49d7a247ed30d11ac21a7517157a183d5d91e415da
156 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 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 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://midufefew.ru/wix?keyword=word+that+start+with+r+that+are+positive PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4497095/normal_6023953c5752c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379240/normal_6035467135bd5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369516/normal_5ffd00f22bb50.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485930/normal_6002413705bfe.pdfIn PDF document text
    • http://idealica-ufficiale.site/how_to_do_psychoanalytic_literary_criticismxtlgy.pdfIn PDF document text
    • http://uber-global.com/two_player_ps4_games_split_screenakhp9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418180/normal_5fd242d49788d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428083/normal_5feb18139fe78.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454679/normal_600202d826302.pdfIn PDF document text
    • http://onlinekartiadesi.com/116677994137f2l2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376354/normal_5ffcefd255db7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485016/normal_5fe0b01ac1b97.pdfIn PDF document text
    • http://tryne.xyz/axcrypt_1._0sk1lz.pdfIn PDF document text
    • http://remont-kvartir-otzyvy.moscow/medical_terminology_a_living_language_7th_edition_freetat7n.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://58f604bd-1fd8-4cfe-af9b-f15e67d030d5.filesusr.com/ugd/9a7439_43d49772bbb6489887123483939bcd14.pdf?index=trueIn PDF document text
    • https://0f8fedcd-12c0-4678-86f8-e2bff7269121.filesusr.com/ugd/70e7d4_3270c94343734c188e4d32ec6c6a93a4.pdf?index=trueIn PDF document text
    • https://37523d11-79cf-4eb3-ada4-f05de57c71ee.filesusr.com/ugd/275374_cd2fed8495d54c34ae6d7cb6a97d2e52.pdf?index=trueIn PDF document text
    • https://21a67f6d-2aea-439f-a910-ed4feb6be009.filesusr.com/ugd/173616_686471e8c5c5422e92e8824eb0a280d9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c5194da-7702-4838-adf3-2cdd00b44843/percy_jackson_and_the_olympians_the_lightning_thief_book_review.pdfIn PDF document text
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_2f9d05c0b0b44cefba2477357e48a5ec.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7397ae6-c454-4f19-b677-1135e03795ba/herman_miller_aeron_chair_size_c_refurbished.pdfIn PDF document text
    • https://ef4b221f-cfb4-47e8-bf1d-3b5092770df7.filesusr.com/ugd/4948da_3b0ed9a5c91a4ab1aefcf4d9a6da0873.pdf?index=trueIn PDF document text
    • https://d451e762-8e00-4155-9971-9512d28d2528.filesusr.com/ugd/b52961_b3ea344915de47c6852857549ad6a84d.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_off0001a9d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A9D0 5180 bytes
SHA-256: 70d34056579980dcc2e68bf9fc7e28e5573f656e49871e0c2789dfba419cfd7a
font_01_sfnt_off0001bb87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB87 10372 bytes
SHA-256: 9a02df4779697e22e1c188d21bb8360af060bdbda2c317dc589eff49817355fa

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