Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d180d7653422bec…

MALICIOUS

PDF

82.1 KB Created: 2021-03-31 02:14:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 70fd3dcff35ea37710e7665b9a3a7f6d SHA-1: 470b7cd04b51f00b939ee8722d03b25e25b8b956 SHA-256: 7d180d7653422becae88878d2a39d1aa94389ef67b5ba566618ef5d5ae8af9ec
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were extracted, the presence of the external URI suggests an attempt to redirect the user to a malicious site.

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 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://resalured.ru/wix?keyword=edmonds+heights+k+12+vesta PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495254/normal_602e2f3cc5983.pdfIn PDF document text
    • https://cdn.sqhk.co/rumoligodo/hfjfF9x/samsung_galaxy_tab_a_10._1_game_launcher.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385633/normal_601da1ff94563.pdfIn PDF document text
    • http://dapurixid.sportsontheweb.net/criminal_background_check_form.pdfIn PDF document text
    • https://cdn.sqhk.co/jokalirubore/FFzOZgd/7162345440.pdfIn PDF document text
    • https://cdn.sqhk.co/vegeboranida/otHjgyJ/23569659651.pdfIn PDF document text
    • http://majikok.mygamesonline.org/zoraluzifuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419194/normal_602ec0006dca2.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://0ed7c29b-d5f2-4290-8b47-add6aa38300d.filesusr.com/ugd/32a223_07aca40927604a9ab60e445853c44ba2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/block_diagram_in_control_system_examples.pdfIn PDF document text
    • https://0879403c-3be5-48e4-925f-21334a7d5cfe.filesusr.com/ugd/407fcc_54bb001230664d67ad45edd04f1f41fa.pdf?index=trueIn PDF document text
    • http://kavezusi.onlinewebshop.net/cry_the_beloved_country_free_online_book.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/70161551269.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6948a4f5-b965-4d79-9e48-88c877ca64aa/captive_prince_trilogy_review.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/lofotutuwas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6279a67-0573-45ce-9d3a-87d1ec44582d/91126026685.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2490ee6-d81d-4494-a9a8-6f96d8c4305f/vekubivibewut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db9698a8-1c14-4036-900f-582b60549ca5/what_does_the_left_side_of_the_human_brain_control.pdfIn PDF document text
    • https://34a711a6-6b77-41b4-a6d5-f55437226814.filesusr.com/ugd/c1ce8b_fcc0968c64ec42db90413301e072be92.pdf?index=trueIn PDF document text
    • https://d25e5d79-f3dc-43ab-8538-58f2f4730235.filesusr.com/ugd/898300_6420b6deebe743848d96076986610781.pdf?index=trueIn PDF document text
    • https://899154e9-876a-4ab4-94d5-c8ef2aed10f2.filesusr.com/ugd/dcf9ad_3c01d368ded347c19e88c7bb291034f0.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B5 5164 bytes
SHA-256: 5678706a4f17a5027b8bf9f777e07ee3e997e808e5004e28c8bfd6f441872e00
font_01_sfnt_off00010527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10527 11568 bytes
SHA-256: 93a9fe56a3b0dd7eafb346b32140814e6f8dd5860ec2cad06d887585e92a1c2b
font_02_sfnt_off00012cda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CDA 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c