Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2bc5e7d8a17dd2d…

MALICIOUS

PDF

86.4 KB Created: 2021-03-21 10:45:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 9f490825b7035c21892e65bed7880cbf SHA-1: a9bf8a3a8dd8da6c7511d89bde35d45b87168920 SHA-256: f2bc5e7d8a17dd2d435aa1ff06cc8746774a407805313fcc782c8f8e29c848eb
186 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One prominent URL, 'https://resalured.ru/wix?keyword=camp+pinewood+apk+en+espa%25C3%25B1ol', appears to be a lure. The document body is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf, a tool often used to create PDFs from web content, further supporting the idea of a web-based lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://resalured.ru/wix?keyword=camp+pinewood+apk+en+espa%25C3%25B1ol PDF link annotation
    • http://getcabinets.xyz/confluence_create_site_templateodp18.pdfIn PDF document text
    • https://zasazijubafal.weebly.com/uploads/1/3/5/2/135299125/d009da76b72b03.pdfIn PDF document text
    • http://itdiscount.info/pierogi_kielbasa_sheet_pan3hrhf.pdfIn PDF document text
    • https://pafufido.weebly.com/uploads/1/3/1/4/131407890/9613693.pdfIn PDF document text
    • https://lalojitewimagix.weebly.com/uploads/1/3/5/3/135304200/6155257.pdfIn PDF document text
    • https://titepusigob.weebly.com/uploads/1/3/5/3/135392267/dasebu.pdfIn PDF document text
    • http://topstop.site/457217615949khgz.pdfIn PDF document text
    • https://tadafemuge.weebly.com/uploads/1/3/4/4/134480681/7766319.pdfIn PDF document text
    • https://vanazufir.weebly.com/uploads/1/3/2/7/132740694/nubog.pdfIn PDF document text
    • http://classkaod.ru/colt_ar_15_instruction_manualseeat.pdfIn PDF document text
    • https://xuwosanilenerev.weebly.com/uploads/1/3/4/9/134900173/ac6257f0037ed3.pdfIn PDF document text
    • https://tobisimotar.weebly.com/uploads/1/3/5/3/135330661/1399717.pdfIn PDF document text
    • https://xinelonaveguv.weebly.com/uploads/1/3/4/6/134606197/vinetizibibizosupo.pdfIn PDF document text
    • https://gomimujexewawid.weebly.com/uploads/1/3/1/0/131070583/5483710.pdfIn PDF document text
    • http://d-youtube.com/47646961753dujil.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/29cbbe8e-8977-47ee-bd56-472283391d23/tokyo_ghoul_re_call_to_exist_ps4_digital.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff99f9b1-2083-409f-bcee-f09423001758/radio_shack_weather_alert_scanner_pro_82_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16d96730-06c2-42fb-9e38-207ae0357037/15632906658.pdfIn PDF document text
    • https://ad858f6a-7bbb-416d-9365-e04d7986ed9b.filesusr.com/ugd/3c9ac1_8d3f8a2509d0411d9ce6ab481c605ac2.pdf?index=trueIn PDF document text
    • https://0cc2a7d0-6f33-4335-9ec9-554d9418487e.filesusr.com/ugd/cb4a18_1c8823a6a9ee414ebae17cb825df3959.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/77bd5c0f-a3be-4c9d-9d54-7bef8adefc85/how_to_use_english_words_in_daily_life.pdfIn PDF document text
    • https://1a6c606f-1efd-495f-9370-57f425d809fd.filesusr.com/ugd/1be480_8130626749a84fa1bd0b71fd42da1536.pdf?index=trueIn PDF document text
    • https://9f53eded-325d-4e02-8430-7c09bd872488.filesusr.com/ugd/e04405_6ee50ba139f54ed581aaeefcbbb4294c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/37b66b92-c7aa-4594-bdc1-401dc2ebdd8e/where_to_buy_bayer_contour_next_test_strips.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_off0001028c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028C 5108 bytes
SHA-256: 212220765fd0c2e4e60ed180f12f9cd3eed7f6e80eb3630c3445676e0db852b6
font_01_sfnt_off000113a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A1 12156 bytes
SHA-256: f63520cb2f3a0720173668ed75c62ce957d433b25ba1b1c63753990b8fe97fde
font_02_sfnt_off00013b6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B6E 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

Open this report in the interactive analyzer, or submit your own file for analysis.