Malicious PDF — malware analysis report

Static analysis result for SHA-256 97284701812d5a5e…

MALICIOUS

PDF

87.5 KB Created: 2021-04-09 07:09:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: b7e8985c4b32c7aa2c4a11745ffdc5ce SHA-1: d82213e0ab82b712ff79e91c7aa4984894559346 SHA-256: 97284701812d5a5e9021aa00b2299c0edf600fd1c652f4a910d25745273693d8
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to a URL that hosts an Android application package (APK). This suggests the document is part of a phishing or malware distribution campaign, likely delivered via spearphishing. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • 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.
  • 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://xezojetit.ru/strik?utm_term=how+much+does+a+hollywood+screenwriter+make PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4487622/normal_600ccdff27d60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419846/normal_5fdb35cd4fd14.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446944/normal_600840e74cf1e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453885/normal_5fcf77a5a87bb.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://s3.amazonaws.com/voxulija/meme_generator_app_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76c19192-8e29-4d6b-8ffb-3776eea956ee/bulova_marine_watch_band.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b504396-3ceb-47ac-a5fc-80a364ea9d51/6931824954.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/31675650258.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/abbottabad_public_school_admission_form.pdfIn PDF document text
    • https://a79fbd7c-12a6-44fe-9d3c-43dc2b0795a8.filesusr.com/ugd/f95141_d3228996da494ca4b151d80b4614240d.pdf?index=trueIn PDF document text
    • https://02408c19-b9f6-4996-a596-1d5b7e46c8d3.filesusr.com/ugd/c83fdb_c9e060ccb78847e1bdf3a8327c8b9634.pdf?index=trueIn PDF document text
    • https://d19688e0-347f-4d9d-8cb3-d47c6e049f3d.filesusr.com/ugd/c618e9_f014e6c2adf6448cb5351db8c8dff678.pdf?index=trueIn PDF document text
    • https://1fa67a36-2e8b-44cc-a955-751d80433762.filesusr.com/ugd/d85e51_479b5ebf2a504f3ab34c70cb2630e2fe.pdf?index=trueIn PDF document text
    • https://5fdaa9e0-ad6d-443b-8779-beb8e45026dc.filesusr.com/ugd/05301a_45ee9b844053463c88db35321ca02088.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/gugeweduzokarad.pdfIn PDF document text
    • https://1c684d3d-b1aa-4d58-8f8e-408f9cf37fac.filesusr.com/ugd/64d889_8891f21cccc64f42b3cec87b71dc4ef9.pdf?index=trueIn PDF document text
    • https://b8e64ff8-a522-4625-8e91-70fe47930cb2.filesusr.com/ugd/37987b_6f3d5b968db44005a61e9bf2ef19682e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/295a729a-80a9-454d-ad7b-467e8b42f06d/who_do_enfps_get_along_with.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04fe81b1-4c4b-44ad-88ec-9ea9d9fa20e7/can_i_charge_a_battery_with_a_power_supply.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/lsst_lincoln_ofsted_report.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/adventure_of_tintin_mali_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/ldr_12mm_datasheet.pdfIn PDF document text
    • https://391e4f24-9fc9-4707-ac06-338edcd9f959.filesusr.com/ugd/110ef3_6e5a70101c5044f4a1dd442bdcd0b18b.pdf?index=trueIn PDF document text
    • https://893c8be9-d140-4a04-8a3e-66bd54b472cd.filesusr.com/ugd/efd7ea_438541e962d24e139d6987084cbad32d.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001082d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082D 5280 bytes
SHA-256: 45969cc59528d7376a0c268e74a87f3ca6ff3771fb415a1c4d6042de421d9b48
font_01_sfnt_off00011a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A09 11252 bytes
SHA-256: 48e5fdfd0f8d7c6f1ec032df3721479567d6421ae67dfe46641abc6e2665a765
font_02_sfnt_off00014048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14048 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361