Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d47a80ec7240cdb…

MALICIOUS

PDF

77.9 KB Created: 2021-04-14 02:43:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e8a69a4d8afd588dfb9060cad44607bd SHA-1: 19e7f27fb7d3fd4aa28e8859c1081e409abaf9b6 SHA-256: 7d47a80ec7240cdb848426217081e6273dfd05750ddb4826848abdd111fa3c46
146 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. It uses a QR-code lure. 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 0.9997

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 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://midufefew.ru/strik?utm_term=kindle+touch+instruction+manual PDF link annotation
    • http://3bki.ru/honeywell_thermostat_focuspro_6000_resetwkixl.pdfIn PDF document text
    • http://ita-fitness.fun/nabunepudumur411.pdfIn PDF document text
    • http://iranianvc.com/kajikifafepejibowrexr.pdfIn PDF document text
    • http://hh666o.site/husqvarna_128ld_spark_plug_sizeph8r4.pdfIn PDF document text
    • http://3gusevshop.website/foscam_fi8918w_ip_camera_toolmv94y.pdfIn PDF document text
    • http://clubstore.pro/coleman_inflatable_hot_tub_chemical_instructionst94ne.pdfIn PDF document text
    • https://cdn.sqhk.co/wagomito/hbibhhb/stickman_ninja_2_ultimate_ninja_warrior_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/kisunika/iazjjhf/xakekuxozetofi.pdfIn PDF document text
    • https://cdn.sqhk.co/zivudasexoni/OjjOJZM/small_business_ideas_entrepreneur.pdfIn PDF document text
    • http://lnstagramsupportinfo.com/jesuzofasevvm2h5.pdfIn PDF document text
    • http://purpless.vip/47278397778cdcyd.pdfIn PDF document text
    • https://cdn.sqhk.co/vumuwuxa/hfjfihu/vegodof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://54fa3baf-6954-44a2-98df-2137f0cc340f.filesusr.com/ugd/14b79e_4635b9dfd80d467c9ba76877d7710a46.pdf?index=trueIn PDF document text
    • https://83372c7a-1065-4b07-8284-b64562b46e84.filesusr.com/ugd/035489_0b08edea4779477ea778c472349de065.pdf?index=trueIn PDF document text
    • https://a3de454e-1598-42bb-a259-4eb69c42f179.filesusr.com/ugd/fb5067_fd2d1b2d1e7f46d7ab5a2c43fd348f2c.pdf?index=trueIn PDF document text
    • https://631ffb88-cf2d-4844-8d6b-9338a1b21cc5.filesusr.com/ugd/d24e6f_163abb3973dd45bbb743b568a69fec21.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bisazabe/43428795872.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/jomikuwo.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/everstart_maxx_spotlight_review.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/how_to_deal_with_parental_alienation_syndrome.pdfIn PDF document text
    • https://51da6a7d-ee05-4a49-87ee-1b74af3aeb07.filesusr.com/ugd/b80405_2f7cc2cca115467fb5a5e7dafeb59a6e.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF254 5148 bytes
SHA-256: 4dbb50f5dfa9b53f4eac665df1f51c6c5e6c589d0830933b92a61fcb9104e6fd
font_01_sfnt_off000103a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A7 11004 bytes
SHA-256: 5f96887432030ca2f3aae6374c68c6f0e38dc2a8f5ff1728f9bbdf4784447155

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