Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5be53e9c7d37e42…

MALICIOUS

PDF

132.4 KB Created: 2021-03-30 18:00:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 8fab527a3b1055f1e451b7258c2065f7 SHA-1: c06988aacd1326252d107ba476a1bdb74b2bb357 SHA-256: b5be53e9c7d37e4242682898b282d21cdc2c86c265077c0f45edf5118074c78f
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to distribute malicious content. The primary URL, disguised as a user manual, likely serves as a lure to direct users to this network of potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://lozipotod.ru/wix?keyword=dji+mavic+2+pro+user+manual PDF link annotation
    • https://vafukomoruf.weebly.com/uploads/1/3/4/8/134862603/2415756.pdfIn PDF document text
    • http://wobafobigo.mywebcommunity.org/estado_de_derecho_definicion.pdfIn PDF document text
    • https://vamexerop.weebly.com/uploads/1/3/6/0/136085595/gupunu_fametapekeki.pdfIn PDF document text
    • https://neremepapo.weebly.com/uploads/1/3/4/6/134653798/2299285.pdfIn PDF document text
    • https://cdn.sqhk.co/duloputemab/ijENibn/35612134905.pdfIn PDF document text
    • http://dejepuzalew.mygamesonline.org/24048555107.pdfIn PDF document text
    • https://cdn.sqhk.co/lokovipazal/egcShhv/62591730632.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvaratuji/sji4tqa/absorption_coefficient_of_silicon_for_solar_cell_calculations.pdfIn PDF document text
    • https://gunagejosiva.weebly.com/uploads/1/3/0/7/130738835/sikawotu.pdfIn PDF document text
    • https://xotomunekezej.weebly.com/uploads/1/3/1/0/131070571/bavan.pdfIn PDF document text
    • https://cdn.sqhk.co/buwozumu/Bij0ghy/google_lesson_plan_template_free.pdfIn PDF document text
    • https://zowololo.weebly.com/uploads/1/3/5/2/135294949/0deddcf41c1d.pdfIn PDF document text
    • https://cdn.sqhk.co/nasubivapu/hggegiJ/amazon_cdl_driver_pay_rate.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://lurolubudoruk.onlinewebshop.net/11611768787.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/java_platform_l_g.pdfIn PDF document text
    • http://lawaxisagiwog.atwebpages.com/40794635812.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/true_metrix_meter_coupon.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/niwapojukakumegumeze.pdfIn PDF document text
    • http://kisalonokexiwi.atwebpages.com/belmont_map.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a39b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A39B 5148 bytes
SHA-256: 8a970f88e46aa1e2f9fc3c28b8aa73a4b44de6f99d4320d9741ede179df805ae
font_01_sfnt_off0001b503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B503 13076 bytes
SHA-256: e16fc0ae9ae0639478826907304fb5f3debba0b05214ba51590896a4c34f1133
font_02_sfnt_off0001df6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DF6D 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90
font_03_sfnt_off0001f404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F404 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2