Malicious PDF — malware analysis report

Static analysis result for SHA-256 01fed222e08d7d48…

MALICIOUS

PDF

82.9 KB Created: 2021-09-02 05:37:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1d275a33db8d4c99daedf2470daa5bb0 SHA-1: 742ca9726df41e8db2be9a117328740d2ce3583f SHA-256: 01fed222e08d7d48ac9943a169ab13160baaab65e511e6059dcc1699e04b77af
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised CMS upload storage or disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crysiq.ru/uplcv?utm_term=famous+olympic+swimmer PDF link annotation
    • https://projetovm.com/uploads/files/84355886895.pdfIn PDF document text
    • http://lamgi.pl/ckfinder/userfiles/files/97614736021.pdfIn PDF document text
    • https://leavingcare3plus.ch/userfiles/files/94458758713.pdfIn PDF document text
    • http://newmanclassof1965.com/clients/4/4a/4a7b3a1a0fb21659e68ac19badabb541/File/56884823633.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/xolanobovagimupaxo.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/32855693825.pdfIn PDF document text
    • http://mebco.ru/images/file/norekagakoxozolel.pdfIn PDF document text
    • https://evboosters.com/wp-content/plugins/super-forms/uploads/php/files/f2cf3c990e6363ee2045f4463d12af1f/memaxeferelijelaza.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/nemupu.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb68d76ea6---61639547989.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//lomalovi.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/ecdb0fb327553c4ecbd99b1737ec3d5a/butemigodixabonaguvogufa.pdfIn PDF document text
    • https://meganimal.pt/site/upload/file/46664497414.pdfIn PDF document text
    • https://bangvetthuong.com/luutru/files/lujobezawib.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/bemukigenudopamivuw.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/7v3l71h5mijveocudfuoptbb96/74976958176.pdfIn PDF document text
    • http://execdentalclinic.com/uploads/ckfinder/userfiles/files/kodidofowulutum.pdfIn PDF document text
    • https://auto826.com/uploads/files/sugozegovaf.pdfIn PDF document text
    • http://mcenterdk.ru/fck_editor_files/files/sekelaxefasaxirololenaxep.pdfIn PDF document text
    • http://bigxra.com/uploadfile/file/2021070204591373499.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/desifetulinonome.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/bezimajixologezazaziban.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE037 10612 bytes
SHA-256: d5198e5e8b27d998e92d130e9b027c1a85e246343762966b1fe5c7c507f3fb6c
font_01_sfnt_off0000f890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF890 17572 bytes
SHA-256: 80d074cf4ca554c8ce621769a075d4a5c0b3a73f5928dc8619cda49ef3048fe7
font_02_sfnt_off00012655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12655 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1