Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f79393525a4fe58…

MALICIOUS

PDF

88.8 KB Created: 2021-03-19 11:45:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7d9620998036de6080543005d19de5c SHA-1: 0165ea753b1a749c1855575f931839bcc184871d SHA-256: 9f79393525a4fe58c8eecdb4bf61c49388a8bbb66545f508204fde3f4f9ffba5
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized and point to potentially malicious domains like vilenefex.ru. This suggests the document is part of a link farm or phishing campaign designed to drive traffic to malicious sites. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/wix?keyword=taking+sides+clashing+views+on+bioethical+issues+pdf
    • https://cdn.sqhk.co/setuboluraje/jdJDPjf/92323091058.pdf
    • https://cdn.sqhk.co/kixepijap/Lhiifif/sefirabojonopagorodedag.pdf
    • http://pinerapidsrr.com/53873331999qkjk0.pdf
    • https://cdn.sqhk.co/divoxisig/YJAingh/pecan_audio_edera.pdf
    • https://cdn-cms.f-static.net/uploads/4486200/normal_6046513948352.pdf
    • http://bitsracing.net/the_divergent_series_allegiant_free_online_movie5k081.pdf
    • http://goldstein.capital/xedigazusarepebidazip9lybo.pdf
    • https://cdn-cms.f-static.net/uploads/4461201/normal_60319c2d678d3.pdf
    • http://impergamon.com/boxexoduvujunhy3wm.pdf
    • https://cdn.sqhk.co/kilatelazobe/GghXnfk/45766865778.pdf
    • https://cdn.sqhk.co/zupuguvawaj/gfjejbx/mutant_creatures_addon_mcpe_1._16.pdf
    • https://cdn-cms.f-static.net/uploads/4408989/normal_60247ce29a777.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/7a8ffb7d-1dd9-45ac-88ae-d160f8d3fb3c/insinkerator_evolution_compact_vs_select_plus.pdf
    • https://s3.amazonaws.com/poresi/wareveritisokiku.pdf
    • https://80172413-d145-4b71-b7cf-4a007d76ad29.filesusr.com/ugd/cacfd7_e64198ed436c4c04ae4ca4dc3cbeab50.pdf?index=true
    • https://uploads.strikinglycdn.com/files/be224300-9ba3-4fd8-8870-c9c1f944bba8/31302575759.pdf
    • https://s3.amazonaws.com/mesotodimus/cadmium_safety_data_sheet.pdf
    • https://uploads.strikinglycdn.com/files/e7dd99f4-abf9-41da-aaef-782cb7117eeb/lorex_eco_stratus_app_not_in_play_store.pdf
    • https://s3.amazonaws.com/tuzamada/oracion_del_espiritu_santo_catolicas.pdf
    • https://s3.amazonaws.com/telasebisu/sodepadorajelejewaxazu.pdf
    • https://caf0f927-206f-4b4e-aa34-0dd3da53679b.filesusr.com/ugd/83d902_a219d8e0514940ebaee9c7abfae8b6d2.pdf?index=true
    • https://s3.amazonaws.com/povodijirig/amarula_cocktail_recipes.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f4a.bin
a9f5686442d799ad64f1f9a2a8b9d652637d52e048deb5d3db4fa8597bc2b02c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F4A 5508 bytes
font_01_sfnt_off00012215.bin
c94103a296cc8576db74ab06a0e44120b4858311ef87199dc74d707963d4d011		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12215 10868 bytes
font_02_sfnt_off0001470e.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1470E 4324 bytes

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