Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a46fbef9c929a62…

MALICIOUS

PDF

105.6 KB Created: 2021-05-14 02:01:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 2ff1d0f58b93846a97b22d6acd2e1392 SHA-1: 50144fd3b311ddadf1350f5e114a033279f11450 SHA-256: 1a46fbef9c929a62883345ce08fd217db9ed4a790933e691cd89369f67b15b49
226 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to distribute malicious content or facilitate phishing. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, contains keywords related to a Dell laptop review, likely a lure to encourage clicks on the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://jottigo.ru/strik?utm_term=dell+precision+m4700+i5+review PDF link annotation
    • https://nozigofomin.weebly.com/uploads/1/3/4/4/134481739/fexepagove.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefima/ficpPge/usg_guided_sciatic_nerve_block_nysora.pdfIn PDF document text
    • https://cdn.sqhk.co/wanifeloxege/Kwhiqhi/vutamevaxuvad.pdfIn PDF document text
    • https://cdn.sqhk.co/doginifa/VDhdEWt/40216123228.pdfIn PDF document text
    • https://motutipe.weebly.com/uploads/1/3/4/6/134674000/4155531.pdfIn PDF document text
    • https://xutonipojoneri.weebly.com/uploads/1/3/4/6/134667901/jedanam-miwum-zoxugekivap.pdfIn PDF document text
    • https://cdn.sqhk.co/terodekijur/djd04DK/12401415560.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://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_a422d48a683049eba16f4ce250d78be1.pdf?index=trueIn PDF document text
    • https://6593eeda-10fe-4128-810f-cbbc79f0a4f8.filesusr.com/ugd/c0a4bf_6fd48e27c913418a9698cfe15ec4dffd.pdf?index=trueIn PDF document text
    • https://459ec6dd-5b69-4322-a182-74abbfaa0e48.filesusr.com/ugd/221eaa_5da4755b96764ef596739efded7b7c03.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/zabomoludotatazugisiwi.pdfIn PDF document text
    • https://0524119b-9543-44d4-a9c1-6a2a85ae2681.filesusr.com/ugd/b12506_cb29f31673804c4095fd321fd6ee4efa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/523d024e-f056-4545-92c7-c5bbc0ea2b0c/rerikon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3233c40a-ba61-4928-9736-7b04b063e628/masterbuilt_turkey_fryer_xl_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/zugarixodosomomulijod.pdfIn PDF document text
    • https://ac734925-007a-49fa-9a6b-2340142042ec.filesusr.com/ugd/ea78e0_e70cd5a243944c89a32bb85e68c90b0a.pdf?index=trueIn PDF document text
    • https://b20aee1f-b1b7-4e4e-be5e-d884e4ece670.filesusr.com/ugd/10e3af_25bd5a5229354e8bb46a352b761adba6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mosezavor/xozagop.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/log_log_plot_linear_regression_matlab.pdfIn PDF document text
    • https://c0771fee-1ba5-4dbf-bba5-a775c3d44c03.filesusr.com/ugd/544e7e_fa9e4e38e8d94aa8a00f966d23f71319.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sizabo/pupipasume.pdfIn PDF document text
    • https://229c3593-bb94-4e5d-9b9f-ca3747df48ef.filesusr.com/ugd/145364_b85825ecf06647fc9e3ae8e66ba7e5d3.pdf?index=trueIn PDF document text
    • https://26c1613e-5d28-4fa3-89cb-3d2c9ab59faf.filesusr.com/ugd/fe83c3_739f0ecdf3894f81975f8a57af510e6d.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000151d6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x151D6 31296 bytes
SHA-256: ecec955b867f2e77c4c03f9d13abefe3675e5086a859b2ea9e8f3a4b6587da0b
font_00_sfnt_off0001198d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1198D 5160 bytes
SHA-256: bc77af2fce33f7838199177336aa25ca6f80372061429c631ef84354e1a555d5
font_01_sfnt_off00012b12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B12 11328 bytes
SHA-256: 32e430bea60c9dd3536ba87f48f42fff85ec18f76f0bdb4acadda17662e7f5d5
font_03_sfnt_off00018843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18843 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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