Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bd88e573ceccd38…

MALICIOUS

PDF

88.5 KB Created: 2021-03-21 12:11:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 22dfaba27e9abb8e5edbb3c9bcabe0e3 SHA-1: 90ac518b1403f124e78a58932366fec933f0ff9c SHA-256: 3bd88e573ceccd3839ce8ddbe3d7450d7b9cb7d1859b81c5778c9b141fe4c57c
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting it's part of a link farm designed to manipulate search engine results or redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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.
  • 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://fokemale.ru/wix?keyword=wayne+dyer+pdf+francais PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368996/normal_5fe3c0d9d7a26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425913/normal_6054904be7f74.pdfIn PDF document text
    • http://toolsbestpricemicrometer.site/baking_sheet_paper_alternativeayf4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446161/normal_603b453e2e55f.pdfIn PDF document text
    • https://cdn.sqhk.co/nizekidido/Lih3agi/fenojutubewajovasitilugoz.pdfIn PDF document text
    • https://cdn.sqhk.co/motixekotet/cBgjhcB/graphic_facilitator_s_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/feduminaro/cgeSyGU/58209281125.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464534/normal_603e3cc916ba0.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/hgjiigt/difilow.pdfIn PDF document text
    • https://cdn.sqhk.co/jesupesiparu/aibghaP/fazedeneluv.pdfIn PDF document text
    • http://leqqurint.online/mp3_player_online_shopping_lowest_price8voau.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474445/normal_5fd7d81a757b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458132/normal_6015f53f34204.pdfIn PDF document text
    • http://topplafond.xyz/eurydice_bologna_process_implementation_report2dsdb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376610/normal_5fe426824f472.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406501/normal_5ffc9f3a55dd3.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://c0b8f06b-4e98-4d3d-89ef-2f08caba629a.filesusr.com/ugd/0c8cc8_b74af59a43eb44738290bc087a618ef2.pdf?index=trueIn PDF document text
    • https://e61e9f85-32c5-4861-9fd4-b89109084c35.filesusr.com/ugd/2e4eb4_47471ba7a328400fb678b2f754dbef29.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f7970b8-3970-4396-bbc2-6970036aeb39/54692370484.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a81f915-b4a1-43db-8b6e-eb20f1021226/engineering_mechanics_statics_solutions_12th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2397561-2a0a-4360-be5b-771587b7b115/computer_parts_and_their_uses.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00012b40.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12B40 17772 bytes
SHA-256: 20cd7a294e65a5d1c97b30ca0118e8488a1fd032e6d8f7f3375dc364da2f426d
font_00_sfnt_off0000f29d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29D 4832 bytes
SHA-256: 46d49302237338619dba5cce2baaa3fe359efaab37eac3aefd85e286bb059f45
font_01_sfnt_off00010316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10316 12552 bytes
SHA-256: 9cf2481eed6dc4fae367c340500d7c4e04606d4908014b5b746e73275226654d
font_03_sfnt_off00014619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14619 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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