Malicious PDF — malware analysis report

Static analysis result for SHA-256 7180b1c186bd5fe4…

MALICIOUS

PDF

75.7 KB Created: 2021-01-03 07:40:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: eb98199864664fb13e99c04b217bc725 SHA-1: 5dc2e30b5422c7a03d9835005f52c077f421ad0e SHA-256: 7180b1c186bd5fe4e167a1afabe3512a59843e7a094a67954c6be7eebcee2e3d
244 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to disposable hosting and redirector infrastructure, indicating a link farm or SEO manipulation tactic. ClamAV and ML classifiers strongly indicate maliciousness, with specific detections for phishing and trojan behavior. The presence of embedded URLs and the nature of the link farm suggest an attempt to redirect users to malicious sites, potentially for further exploitation or phishing.

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
  • 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.
  • 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://traffking.ru/aws?utm_term=stream+music+from+my+pc+to+android In PDF document text
    • https://zabapekiji.weebly.com/uploads/1/3/4/4/134470890/4594688.pdfIn PDF document text
    • https://zuxibonidape.weebly.com/uploads/1/3/4/8/134889984/xovedan.pdfIn PDF document text
    • https://cdn.sqhk.co/xogovofofi/hhdhb7q/xiwomuvivevironudurawito.pdfIn PDF document text
    • https://ranalugepileli.weebly.com/uploads/1/3/4/7/134735155/jobeb.pdfIn PDF document text
    • https://jinugavov.weebly.com/uploads/1/3/4/4/134438703/roziwotoluko.pdfIn PDF document text
    • https://tejebufu.weebly.com/uploads/1/3/4/3/134353082/dd7ffc58.pdfIn PDF document text
    • https://cdn.sqhk.co/wotutovebo/fDpgghe/woodworking_trade_shows_2020.pdfIn PDF document text
    • https://muxamaxipusitu.weebly.com/uploads/1/3/4/4/134470051/boxanekel.pdfIn PDF document text
    • https://sosufafa.weebly.com/uploads/1/3/4/8/134862430/1352508.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://uploads.strikinglycdn.com/files/6bd9a2b0-78c1-4859-a63d-493784a402a2/office_2016_crack_iso.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/sat_test_dates_2020_nj.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/convert_word_doc_to_editable_form.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/big_data_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d995067-ad1c-4525-b231-fbddd281a4c1/mumen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7b0b32b-5880-41d7-be0d-05708e85a622/saxijajatunites.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_off0000db9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9F 5356 bytes
SHA-256: 6ac4d5bcaed3c58a244e91797ad13c2aee3fbac6520f27efd99c346eacc8e302
font_01_sfnt_off0000edb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB3 11016 bytes
SHA-256: 8f32c683240570305c801b54c2a7db84ef1fb511123b8787310dd32ad1204197
font_02_sfnt_off00011370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11370 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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