Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e671b3ed2088144…

MALICIOUS

PDF

86.0 KB Created: 2021-03-31 14:49:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 3a9c5f787f8fe51344491a126dbea446 SHA-1: 9f3cec8d8f5fe4aa79e5115e227087f6be578ca7 SHA-256: 7e671b3ed2088144b49dd64e0361ee235d9752deba9f01772fc7c6b27f8c3cd3
186 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics as a link farm, containing a large number of external URLs pointing to potentially malicious content. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to lure users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://vilenefex.ru/wix?keyword=icivics+a+very+big+branch+answers PDF link annotation
    • http://copriyghtconfirmed.com/88987875434yigg6.pdfIn PDF document text
    • http://madewithsunshine.com/tc_electronic_mic_mechanic_reviewguhga.pdfIn PDF document text
    • http://danoguvokapijof.medianewsonline.com/power_bjt.pdfIn PDF document text
    • https://cdn.sqhk.co/leloxoreje/8XlhbGT/78463509848.pdfIn PDF document text
    • https://cdn.sqhk.co/nilesatu/zjfjcYl/lusobiberowejadusizez.pdfIn PDF document text
    • http://gazizelasama.getenjoyment.net/52779530723.pdfIn PDF document text
    • https://cdn.sqhk.co/fopujetoros/GjdYfgj/45896337211.pdfIn PDF document text
    • https://jaxikagiwuzeno.weebly.com/uploads/1/3/4/6/134698588/8232769.pdfIn PDF document text
    • https://sibafuguwo.weebly.com/uploads/1/3/4/6/134679660/darabujesumuz-nopinigop-lumiki-gifopimenepir.pdfIn PDF document text
    • https://duzezefoge.weebly.com/uploads/1/3/1/4/131437668/9693371.pdfIn PDF document text
    • http://forisawidokomor.sportsontheweb.net/public_relations_strategies_and_tactics_11th_edition_free.pdfIn PDF document text
    • https://sosojenanoxo.weebly.com/uploads/1/3/5/3/135316520/tozijakavifo.pdfIn PDF document text
    • https://mixunolonuwoja.weebly.com/uploads/1/3/0/9/130969204/topolupobotika_titidixokojoj_bezelitixatev_xipenidilufulem.pdfIn PDF document text
    • http://beamorem.com/vikopim4pyae.pdfIn PDF document text
    • http://cancandance.org/23701461411kpwdp.pdfIn PDF document text
    • https://cdn.sqhk.co/zibojaje/hdphjvo/t_mobile_login_payment_arrangement.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/b20drgg/fesemotobetoditizenon.pdfIn PDF document text
    • http://instapriz365.site/3167773683nesf0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d8d691c7-cf48-432b-bece-a54604b57851.filesusr.com/ugd/1e3a4b_c6ee80dc847142bbbb39322cab2246b3.pdf?index=trueIn PDF document text
    • http://gosaduzunake.myartsonline.com/us_history_textbook_high_school_online.pdfIn PDF document text
    • http://furunes.onlinewebshop.net/81341866233.pdfIn PDF document text
    • https://e5aadbcf-511f-4ee2-989a-4410a22eeed0.filesusr.com/ugd/64930c_43125084f82b4de98d7c19b535579629.pdf?index=trueIn PDF document text
    • http://filosoko.onlinewebshop.net/fs_i6x_firmware.pdfIn PDF document text
    • https://7fd92c66-d3af-485c-b7a9-31529ddfb1b5.filesusr.com/ugd/997d0f_1d4e6589626545a899b136662c2b6086.pdf?index=trueIn PDF document text
    • https://0f4267a5-27df-427f-b7ff-de3c6d4a4cd0.filesusr.com/ugd/9e4921_c9ede68ce5f743859f72b6748ef1dd1e.pdf?index=trueIn PDF document text
    • http://kadizilurojiniz.onlinewebshop.net/bubevosoxogumenovezinepi.pdfIn PDF document text
    • https://63aa7d51-6c54-48cc-ac87-b710a0da19c3.filesusr.com/ugd/c8d394_53c80a010a7e444aa9be2928b0955463.pdf?index=trueIn PDF document text
    • http://tikimiwuwal.myartsonline.com/khalifah_dinasti_abbasiyah.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001102d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1102D 5360 bytes
SHA-256: 5a1d96995779d12f233e4ece8e59e9c978baa957c12fc5c1e76c8c34a7c9abd5
font_01_sfnt_off00012283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12283 11956 bytes
SHA-256: 97ed49378fc317952076504bef36fff4a9dd8dad96096548d759afe860fdf62c