Malicious PDF — malware analysis report

Static analysis result for SHA-256 94f22afa3570da1f…

MALICIOUS

PDF

80.8 KB Created: 2021-03-08 17:18:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8a1be4b6744e73e694d8567aa4ff8ac1 SHA-1: 6634a66cf82d19d1b3ec461eb2f1dbbdf3601b92 SHA-256: 94f22afa3570da1fc3a05efcc92d0e707dc8b9f1729af8a130e48cf9ddffcae8
186 Risk Score

Malware Insights

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

This PDF document is identified as malicious by multiple heuristics and ClamAV, indicating a phishing or trojan distribution attempt. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The document body, though heavily obfuscated, contains keywords related to 'osteoporosis guidelines 2020 pdf', likely a lure to attract victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/award?keyword=osteoporosis+guidelines+2020+pdf PDF link annotation
    • http://vilopeg.xyz/how_to_remove_a_jacuzzi_bathtubd5sdv.pdfIn PDF document text
    • http://italywow.space/kuvowaduwexa5mglo.pdfIn PDF document text
    • https://jerewerek.weebly.com/uploads/1/3/5/3/135349205/kakojog.pdfIn PDF document text
    • http://copyrighthelpptteam.com/8968032777dqjzb.pdfIn PDF document text
    • https://cdn.sqhk.co/vatukaso/GijXhih/mimpi_gigi_copot_atas_kanan.pdfIn PDF document text
    • https://cdn.sqhk.co/vudemijugamu/hjfFXhb/fasubiko.pdfIn PDF document text
    • http://shtangye.xyz/938605504410bq5n.pdfIn PDF document text
    • http://wei-nmvc.com/lojaxutejowea5nvw.pdfIn PDF document text
    • https://woninulanomawij.weebly.com/uploads/1/3/4/6/134670754/jenawuzasife.pdfIn PDF document text
    • https://finamiwowekizo.weebly.com/uploads/1/3/2/3/132302732/pobebibexi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xomudufe/bimelasukut.pdfIn PDF document text
    • https://c84d532c-3b33-47d6-96aa-4134a1164eb1.filesusr.com/ugd/6d45f6_713bed60a2864418934509a90a606d37.pdf?index=trueIn PDF document text
    • https://33edd578-4186-4695-89f3-f56a5a23fc53.filesusr.com/ugd/f17c08_b31207fd1a064b0e8fd9632f9fcbc695.pdf?index=trueIn PDF document text
    • https://6c036dbd-b327-4678-b778-de8a2ee7bb50.filesusr.com/ugd/ed64d2_fa93b662b50841b393b54eb6bee4c055.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gitipelut/juparetafemuditevuga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c34b58c7-928d-424a-a183-87bba246a4c7/burger_king_whopper_nutrition_facts_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/latuteko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96f07aaf-bb3c-477e-94c7-e2ce56e11b6a/sharp_cash_register_xe-a102_ink.pdfIn PDF document text
    • https://901c4554-6fda-40bf-8344-1f1538f5dc06.filesusr.com/ugd/a76634_c5b9f2b391bf40489e1f0ef4990eddc8.pdf?index=trueIn PDF document text
    • https://43081b45-6e48-4b43-b724-9328fda377ae.filesusr.com/ugd/26481d_2c82fc884bb04b92b8781d3b0e811c59.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10050 5300 bytes
SHA-256: 7a3b4be84a32068ecdcebfa27a5f3578960373f4cd49184ebad250b6a9bcae6a
font_01_sfnt_off0001126b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1126B 10468 bytes
SHA-256: 169cdee13178f98f359825c4c415891d5eb127543f49935779ca25e4d78ea7a0

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