Malicious PDF — malware analysis report

Static analysis result for SHA-256 7767bb30972be5ab…

MALICIOUS

PDF

98.7 KB Created: 2021-03-17 02:48:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: fe89d193282e3efc68e2f8d7e17e876c SHA-1: 879122242d57103241487568ef5396fb5f90a566 SHA-256: 7767bb30972be5abf79ca88a7fdcf4c37b915c62772c875a7b7b95f3d477ab68
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links pointing to various domains, many of which appear to be disposable or used for SEO manipulation. ClamAV and ML classifiers identified this PDF as malicious, specifically as a phishing or trojan variant. The presence of numerous external links suggests a distribution mechanism for further malicious content or a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://maypoin.ru/award?keyword=ganpati+aarti+sangrah+download+pdf PDF link annotation
    • https://bosubunu.weebly.com/uploads/1/3/4/6/134693877/2e3075.pdfIn PDF document text
    • https://vilofezilo.weebly.com/uploads/1/3/0/7/130740065/fitagibiladava.pdfIn PDF document text
    • http://wikotimu.scienceontheweb.net/pdfbox_pdpage_example.pdfIn PDF document text
    • http://koxudizujan.mywebcommunity.org/ecological_diversity.pdfIn PDF document text
    • http://funewiwawako.iblogger.org/abstract_reasoning_test_2.pdfIn PDF document text
    • https://zoxuzula.weebly.com/uploads/1/3/4/4/134489613/5959650.pdfIn PDF document text
    • http://mesanezedid.mypressonline.com/debop.pdfIn PDF document text
    • http://pewodebepefawi.scienceontheweb.net/62749111990.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://c18d7360-3707-4bf1-9d6f-52ba7510fa17.filesusr.com/ugd/76cb06_6041cdd0e365427db78a1539aeec61f7.pdf?index=trueIn PDF document text
    • https://9e9203d9-9f5b-42f2-a849-05e42d741f90.filesusr.com/ugd/3527d5_ef455b14926a4da1aff19981f8a13b30.pdf?index=trueIn PDF document text
    • https://45ae50e1-98a8-4501-9ad6-fc0df438eb43.filesusr.com/ugd/b16523_29a82bc1d2274611897126ab9aaccade.pdf?index=trueIn PDF document text
    • https://6998e30b-c911-4113-ab34-4c15204891c7.filesusr.com/ugd/429b25_7e8148fff61546b998c808142d49376a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/wekebojolabupuwig.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/manual_bmw_x1_2013_espaol.pdfIn PDF document text
    • https://cd65756b-a9c7-4cca-9498-1747a6459195.filesusr.com/ugd/05eb20_13f49573f1ed4e5e80ba4a545ace52d1.pdf?index=trueIn PDF document text
    • http://xerozodofuvu.epizy.com/starbucks_almond_milk_frappuccino_calories.pdfIn PDF document text
    • http://vesedakowata.onlinewebshop.net/how_many_quarts_of_oil_does_a_2002_dodge_dakota_4.7_take.pdfIn PDF document text
    • https://4c5ad993-366d-4b3a-aa99-9b6f56583180.filesusr.com/ugd/01e791_0796752f7c02437aa1a9e506c068c294.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/96468268294.pdfIn PDF document text
    • http://podedubo.epizy.com/self_guided_bike_tours_italy_reviews.pdfIn PDF document text
    • https://60f6da8c-824c-4163-aae9-6195f2ac7ed4.filesusr.com/ugd/7f16bd_6b79ffd2a0c54ecf9b79bd70b38dd81b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/wivugemufakuzaretif.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_off000138c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138C3 5096 bytes
SHA-256: efd9cb4d4ce592ba8da0cba08f61e5c15dffeeb9db3b1bee54ff5c00207a2189
font_01_sfnt_off00014a14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A14 11036 bytes
SHA-256: 50d37266f441fda4bdf387baa153402e907b7166705dc5a44773a23db89f8164
font_02_sfnt_off00016f64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F64 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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