Malicious PDF — malware analysis report

Static analysis result for SHA-256 811c2fb0bc1a19d4…

MALICIOUS

PDF

79.0 KB Created: 2021-06-04 09:25:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 2938e2c5b49d9ae6bb040c61144f6650 SHA-1: 46099f525ed72b11b8f2fe44af41b878b7e328b8 SHA-256: 811c2fb0bc1a19d4466927e24b56b4cc5707ac8d799c37868d097c9f34401cf9
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain. Heuristics indicate a link farm and a password-protected archive lure, suggesting the document is designed to trick users into downloading further malicious content. ClamAV detection confirms its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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
  • 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://allytemp.ru/pbw?utm_term=ver+contrase%25C3%25B1as+wifi+guardadas+android+7+sin+root PDF link annotation
    • https://rifeseroki.weebly.com/uploads/1/3/4/6/134698736/3da05c047970.pdfIn PDF document text
    • https://palanufijerovas.weebly.com/uploads/1/3/0/7/130739221/388f63f294.pdfIn PDF document text
    • https://jajipovel.weebly.com/uploads/1/3/4/5/134527293/lofuravurisoke.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d17aa4a0-a2f9-4509-ba2f-62240ad05bad/defiant_security_light_installation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f85e5fa4-a9f8-4be7-b3ce-b00d234273d5/kisokaguxurazedidag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a564aff-645e-4c51-b20b-a437e57a089e/geralds_game_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f80d0b08-5ab1-4be2-afbc-c6387d451f35/girijakugibami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8043242e-3257-4ee1-a0d5-96640f55f755/maxejonekiloxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e41b5b3-3335-4a10-b724-16d51c672644/49846508019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38abcbb2-c282-4771-adc4-ea9087381835/what_time_does_walmart_open_christmas_eve.pdfIn PDF document text
    • http://lekipirunezi.pbworks.com/f/game_ultraman_fighting_evolution_3_ps2_iso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ed3ff02-0486-42d3-9105-75fd123ce1b3/how_do_i_heat_up_brie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a04f2f9a-6f99-43d8-bbc6-662cb06df731/5972746305.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e990d01b-2259-4e19-a0fc-442513ab5e42/sharepoint_2016_online_training_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52120db8-9867-4a11-b3bc-4f4df7c27615/97623471294.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d65e3a7-0a01-4ab1-ac0d-49eb0672322b/what_causes_high_blood_pressure_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ff6c962-bd59-4153-9cfd-6b196fc28be6/how_chest_expander_works.pdfIn PDF document text
    • http://jolowajuwijo.pbworks.com/w/file/fetch/144521811/84741467919.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7414aab2-4d6f-41ae-8af1-17a5c40e9110/82339507341.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/450e32af-5415-4d3b-a0d0-58c78bbf15b8/what_is_true_happiness_essay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d503f35f-3f1f-4fa2-8410-a7225603821a/how_to_on_lenovo_keyboard_light.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF225 5508 bytes
SHA-256: 54a29703cd720a7b61608cdc4de3fb2628f6f97183ad1860f171b1fc8f0e041f
font_01_sfnt_off000104cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104CD 12088 bytes
SHA-256: 9330699c9321e46d2e1ca3cc8f0a28b214fc0f39fd70cf7d57383419d9efd1f6