Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaf30935f8c84f91…

MALICIOUS

PDF

77.4 KB Created: 2021-04-05 00:29:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1bb48bb5e14e685ee03a4f2e6966afad SHA-1: 76014ab93e96c3f3e9c5e30cff762240f4f2f054 SHA-256: eaf30935f8c84f91c518d3273b5c260f6038061e696ff641f5b9efa2ca07df0f
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. The presence of embedded URLs and the structure of the document suggest it's designed to lead users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://druttle.ru/strik?utm_term=1968+massey+ferguson+165+specs PDF link annotation
    • https://dopilefuma.weebly.com/uploads/1/3/4/7/134733068/fasewijazujovuwoza.pdfIn PDF document text
    • https://dozunetad.weebly.com/uploads/1/3/4/4/134472758/xewufotimanal.pdfIn PDF document text
    • https://fikenetefi.weebly.com/uploads/1/3/4/7/134771518/50023202d1.pdfIn PDF document text
    • https://vivesajepud.weebly.com/uploads/1/3/0/9/130969004/a2960766f9d596.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://30dce114-5b7d-4ba4-aa44-e083516804ec.filesusr.com/ugd/7de0fd_32e87ac0c0154938861a689bfc0c54eb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/futamo/lifesmart_ls100dx_hot_tub_control_board.pdfIn PDF document text
    • https://c538924d-9290-4e35-808b-5013ecaac822.filesusr.com/ugd/047ea9_997614ff98cd430f938745b25eab377a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/28faba36-403f-4662-b09c-5b0dc8f63f48/letenulafujasologakaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80de8382-10af-4e83-841f-a4ab2f970d35/97287771555.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afaddf55-4e06-4da0-a096-415411e811c3/wapaloroda.pdfIn PDF document text
    • https://19508648-7f28-415f-8121-b57715dc1465.filesusr.com/ugd/9734e7_c165c178920e44849c86537d25d13174.pdf?index=trueIn PDF document text
    • https://4bd9ed84-c80b-4837-bb2f-b1353ebfd8aa.filesusr.com/ugd/5a1791_d72861168b7b4fdbb447168f205e26a5.pdf?index=trueIn PDF document text
    • https://6184de0c-c318-42a7-882e-c5ddc63b817d.filesusr.com/ugd/1c8c1e_e666dd9445e94adda2ede7a53fcc4662.pdf?index=trueIn PDF document text
    • https://16e729f2-8c5c-4787-b670-14aeba6c5e03.filesusr.com/ugd/ac55e2_69c5ac1738324daeb9ce2af55409ff1b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/miledu/abu_garcia_2016_black_max_baitcasting_combo.pdfIn PDF document text
    • https://5c51e3d7-2896-491e-a255-1b002e356b93.filesusr.com/ugd/5b6ce5_99266c14bfdb4b62a3496e7fdce9d494.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/reglage_carburateur_maruti_800.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2df89f78-c2a8-410e-b823-71c6877a5ad1/what_was_the_middle_east_called_before_ww1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c13c787d-f014-4cec-a786-5aeddf2f1700/wajemakujenin.pdfIn PDF document text
    • https://bc3ee532-4344-4262-9f0b-d8353e2229a5.filesusr.com/ugd/6ca3f6_1276768b68e347abbc1eaf33d627bdd1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1747f045-42ec-4783-9fb3-e70ac5afff08/98270647061.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a517751-8b0e-4d4f-a0b1-29b2710a4a07/do_changelings_have_darkvision_5e.pdfIn PDF document text
    • https://05282879-aed3-4f16-ac14-d534add4d4bd.filesusr.com/ugd/0f8b7c_750b9333dfb44bd5874dafecb4857c6e.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_off0000e240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE240 5744 bytes
SHA-256: 33568f9762749758eaed72846b8404d82cb357cee8bcf11dc2003033017653dd
font_01_sfnt_off0000f5a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A5 10668 bytes
SHA-256: f4f19368757fe774ebb09fd465fb810ce7f8ab8523cab59f6d6ff9ffc2629912
font_02_sfnt_off00011a06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A06 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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