Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba795e190ad51788…

MALICIOUS

PDF

103.1 KB Created: 2021-04-23 20:09:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d53feb07a80d56cb3dcb8ed3edecb67b SHA-1: 51fa8b7f42dc548c16ef5ea4dfffdd462b3a7482 SHA-256: ba795e190ad51788a3a66c14ad58195db605c516d4576dcf650a28ddb0786b40
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://dafemum.ru/strik?utm_term=why+is+food+wasted+in+australia PDF link annotation
    • https://zabemogir.weebly.com/uploads/1/3/4/0/134016966/577ab0fa7005.pdfIn PDF document text
    • https://likomajuf.weebly.com/uploads/1/3/5/3/135321460/lejujosafek.pdfIn PDF document text
    • https://cdn.sqhk.co/toxinize/ghmkjjw/18687429779.pdfIn PDF document text
    • https://javubabajekav.weebly.com/uploads/1/3/5/9/135957287/sukopur-welifeteza-zadasumorun.pdfIn PDF document text
    • https://cdn.sqhk.co/mekurapiw/jcXJjfV/traffic_rush_online.pdfIn PDF document text
    • https://tizetenu.weebly.com/uploads/1/3/3/9/133999913/a6d0aa51.pdfIn PDF document text
    • https://cdn.sqhk.co/vixemujomu/7xmiggd/gukubomejegodenoke.pdfIn PDF document text
    • https://fezuwarojeti.weebly.com/uploads/1/3/1/3/131383544/zavulusor_pafelivefotera.pdfIn PDF document text
    • https://sufifova.weebly.com/uploads/1/3/4/7/134736026/4d2ecf53.pdfIn PDF document text
    • https://cdn.sqhk.co/rubovadu/cXIidOU/gomadijomigigalafusema.pdfIn PDF document text
    • https://cdn.sqhk.co/wolebiduju/1jggeje/scrap_copper_price_per_pound_chart.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
    • http://voginafukut.rf.gd/behringer_x32_software_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/indivisible_game_trophy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/wosiworikulinesegiretema.pdfIn PDF document text
    • https://a49a6154-edc8-4132-95a2-c7bb8d673fe9.filesusr.com/ugd/551169_b9a85de86d834f898255b8b5b9a5bb7e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/audi_s4_avant_for_sale_in_south_africa.pdfIn PDF document text
    • https://2daccc73-8708-4113-a26a-4f38906335d9.filesusr.com/ugd/f65175_4a5a7745a8f444418ccf4541ef317023.pdf?index=trueIn PDF document text
    • http://sapofikij.epizy.com/amd_hdmi_audio_driver_windows_10.pdfIn PDF document text
    • https://73099f28-10d5-4558-98a1-2f8dc61f1a2f.filesusr.com/ugd/f62eaa_d314684003444c389d3f0629051e788e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bogeguva/tuxikikukeweziluromur.pdfIn PDF document text
    • https://9579f988-9383-433c-acf3-5fff76e0c882.filesusr.com/ugd/191a6d_5768bc1f4d1041d4b5fc94d2e54de17a.pdf?index=trueIn PDF document text
    • http://wupegamag.epizy.com/aristotle_politics_download.pdfIn PDF document text
    • https://af1bea64-f5cd-41c2-a7c1-97f21c1aa057.filesusr.com/ugd/592671_0f881090f52a4580bb32a17c8dfb29ce.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off000162de.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x162DE 18816 bytes
SHA-256: b5957c85adbd287e937c62be30de9c28637351f404246218bc8ed89ce6906582
font_00_sfnt_off00011a8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A8A 5084 bytes
SHA-256: 9aa5f039550e4452cbdc8da2f4efadf3acbe67e80b195116ec632dbad173f0e2
font_01_sfnt_off00012bd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BD5 3628 bytes
SHA-256: 8310587489a383e4f65fd4baa2c22cea10584947a3311d7b1759ca6f29a1332c
font_02_sfnt_off00013a13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A13 11988 bytes
SHA-256: 5db8d5220c0fdfa21535fcf6d9d3f6fd7bf06274ca15f03623daa817ce0f8556
font_04_sfnt_off00017f30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F30 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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