Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a7fad7070aa8f4c…

MALICIOUS

PDF

100.6 KB Created: 2020-11-25 19:40:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8d640c6c2b850517b578cf0427b220cd SHA-1: ee0ca36aa3610197e81416d04d7f7847589bf0f5 SHA-256: 7a7fad7070aa8f4c5d273a39f82c20361c7d661de6ac105288b0f493a1740d4c
184 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The ML classifier also assigned a high probability of maliciousness. The embedded URLs, particularly 'https://gettraff.ru/123?utm_term=harry+draco+recs+2020', suggest a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the nature of the PDF and its links points towards a common attack pattern for delivering malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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 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.
  • 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://gettraff.ru/123?utm_term=harry+draco+recs+2020 In PDF document text
    • https://togimapobeno.weebly.com/uploads/1/3/4/6/134649298/luvoveporoza.pdfIn PDF document text
    • https://fisolaxarod.weebly.com/uploads/1/3/4/4/134471724/4538821.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419412/normal_5f95c1676f092.pdfIn PDF document text
    • https://lisewukalog.weebly.com/uploads/1/3/4/4/134435391/8558088.pdfIn PDF document text
    • https://joluduloj.weebly.com/uploads/1/3/4/2/134266967/batenolepu.pdfIn PDF document text
    • https://fidurelofomus.weebly.com/uploads/1/3/0/7/130740547/3271424.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/gateme/ansi_asme_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/99645330151.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/libros_adventistas_para_descargar.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/price_of_ginseng_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3f18c8e-127e-4557-9336-0595c057468f/dejuxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c782d41-2544-4f0a-9ade-44d38ca59a3a/93281263717.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42797eff-0a81-4ffd-96fb-6b67e0ea7026/multiple_choice_answer_sheet_1-50.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/kasetetagiluzobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebad6e87-a9b0-4390-b383-fac8ee98847b/39051590767.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/sahih_bukhari_english_download.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 8

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2A 3376 bytes
SHA-256: 5764595176a359f29f6f835ba2c9faaa48ff8a19919710dcf693788793e14279
font_01_sfnt_off0000f955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF955 5240 bytes
SHA-256: 77a7c99f9e9a9579df012d465a6ef5b78e8f4213d9b207ccdeafd455b4cea541
font_02_sfnt_off00010b2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2E 6588 bytes
SHA-256: 6816d9cec12de3aac9c5a74d4f4b8cffd0d8851a405ec3a5c6263af1376f37e6
font_03_sfnt_off00011b2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B2B 4784 bytes
SHA-256: be1ac4e4ef665dbbdecef6703ec902511b6d244bdf1f819de229830a05f915f0
font_04_sfnt_off000129d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129D8 11604 bytes
SHA-256: 986ac898443abdccf037577bfae207324d7b68859c0789b4158e8079ce970512
font_05_sfnt_off00015197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15197 16652 bytes
SHA-256: 8b53dd3c2f7873ab826ce34e0956d08ebe55d5fd2eaab2816951d1bdbddefa7a
font_06_sfnt_off00016909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16909 2988 bytes
SHA-256: 88577c5b9a4bcc1d72c44c97ce7bfd19fb913a29696f287a484b9f738b9673a2
font_07_sfnt_off00017398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17398 6144 bytes
SHA-256: 23e117a124a0e2533cce07ba0531dbb76dd4318d1eb6ebf8e84869e3f3f7d3bd

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