Malicious PDF — malware analysis report

Static analysis result for SHA-256 14f7a561a4f0ef1f…

MALICIOUS

PDF

75.5 KB Created: 2020-12-09 07:39:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 62f9994e5af92aba6b06d2051aedd304 SHA-1: 7f07f98dda190c1c291bba7619b88eaffb0c0d10 SHA-256: 14f7a561a4f0ef1f36463e513c81928a8020579cf62e6d4b03b3073e11822cd5
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous external PDF links suggests a link farm or redirection strategy to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?utm_term=nfl+on+sling+tv+2018 In PDF document text
    • https://poxaneduwi.weebly.com/uploads/1/3/4/2/134234601/7175769.pdfIn PDF document text
    • https://dutajidadu.weebly.com/uploads/1/3/4/7/134730474/c62ab695cfd.pdfIn PDF document text
    • https://jopikivapanip.weebly.com/uploads/1/3/4/8/134854077/c08f25f274d7626.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://s3.amazonaws.com/faluzotixupi/tevamevirugapam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c320429e-e3aa-4b7e-a8ae-e149feaa0f44/bikewevuputejebojax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40b6c900-0003-4fcd-8ea1-492263142393/the_autoimmune_solution_supplements_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/42962361446.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d946be9-9c77-4b8e-815f-8c81e8ca8aba/capias_pro_fine_warrant_texas.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/suzufisufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9414a373-128e-4f45-a4a6-b42e04562686/jokevotigolutu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4779df1d-0382-438c-b628-9d4fe2fb858c/puff_the_magic_dragon_easy_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b4f163b-c071-4b29-a14b-7f97e3062889/bajobopep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8478a49a-6ea1-4ddc-8246-7347521a3a3d/49207566493.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCA 4848 bytes
SHA-256: 007a17b9b428d266e9f39c1f67cd06589dc90c1310eb5b50d71c11ed56f4af5b
font_01_sfnt_off0000ed6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6D 10708 bytes
SHA-256: 926ab950f63929f67928837529d4b40d5a9c23322b659f935b0c064e8084a4b6
font_02_sfnt_off00011219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11219 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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