Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7d57145063e9f64…

MALICIOUS

PDF

86.8 KB Created: 2021-04-03 14:37:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3c778c6754da08d7aab86083491e0d5c SHA-1: 953c64b5e922a1f9953b3b2f671f6c8311367af0 SHA-256: e7d57145063e9f6402ee14ff0ba91dacb8627f403b3c64f59659ad2a4c7577c4
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 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/wix?keyword=sniper+assassin+3+unblocked+games+66 PDF link annotation
    • https://cdn.sqhk.co/koroxofusino/W8C9hbF/pazabepi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393772/normal_6022cdf201fde.pdfIn PDF document text
    • https://sapuzexa.weebly.com/uploads/1/3/5/3/135348006/famoxijepixuke_mufeloretavasez_mutez_pukopik.pdfIn PDF document text
    • https://rebagobu.weebly.com/uploads/1/3/4/2/134265419/segoxofifo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418786/normal_602b45eadd9a0.pdfIn PDF document text
    • https://cdn.sqhk.co/memenewo/gcqhfJi/guvitogezuwigigafajoxa.pdfIn PDF document text
    • https://cdn.sqhk.co/linotepibubi/6ULhiRI/9604999084.pdfIn PDF document text
    • https://cdn.sqhk.co/xavaxonad/Ggjjcge/weapon_mastery_calling_card.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443341/normal_6056d2420a274.pdfIn PDF document text
    • https://zoninezazazi.weebly.com/uploads/1/3/1/0/131070362/wutoriwegogulowojuru.pdfIn PDF document text
    • https://zagezawuguzuvu.weebly.com/uploads/1/3/4/7/134731207/5458295.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xuzed/planet_fitness_application_status.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5771aef1-6f29-4a9e-9185-92ecafd84652/23061613594.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/citizen_cohn_book_review.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/36621782635.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eba48cac-ee8a-46e5-ab76-4a09abccb94a/nulerowadekul.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/58482799896.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40c4131c-c2bb-4ff1-a0d4-449c98fcbcc6/bhagavad_gita_chapter_11_in_english_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c76352a6-0fdf-439a-8da8-2db07e73e3e4/whats_another_word_for_paint_remover.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/indemnity_form_template_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8ff6013-ffe7-408e-bb5d-ae7c161b1dd9/57827360491.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/10346413325.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f03f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03F 5820 bytes
SHA-256: db174c515508d649c413245cccc3ebf155b13a3d5cad40da84b97a49c1cc9d36
font_01_sfnt_off000103c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C5 11408 bytes
SHA-256: 26ccaaaf589c53a179a2466791a9ec2908d814ecf550c6f23035d2c0e6af91f1
font_02_sfnt_off00012ad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD5 16036 bytes
SHA-256: 35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f
font_03_sfnt_off00013f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F3F 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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