Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9780dc2aa24bd7b…

MALICIOUS

PDF

79.8 KB Created: 2021-06-10 02:28:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 20e8195d88cdbfaed5ff27801047f7af SHA-1: 3d5895c3c312e407f39753658281e6ed042104ce SHA-256: c9780dc2aa24bd7bdec0bf2575cb9263723cd1ab500f05fdd070aaf34764b65a
186 Risk Score

Malware Insights

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

The PDF contains a link farm hosted on disposable domains, designed to redirect users to external content. The primary lure appears to be related to downloading games, indicated by the URL parameters. ClamAV detection and ML classification strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • 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://pistant.ru/pbw?utm_term=download+game+crash+bandicoot+ps2+untuk+android PDF link annotation
    • https://kijilijesudopob.weebly.com/uploads/1/3/0/7/130739968/lugutikowejofawin.pdfIn PDF document text
    • https://luxituwane.weebly.com/uploads/1/3/1/8/131859527/718837.pdfIn PDF document text
    • https://nunogekir.weebly.com/uploads/1/3/4/5/134597520/josirelepafi.pdfIn PDF document text
    • https://vexivager.weebly.com/uploads/1/3/4/6/134634122/misotevokimuxol.pdfIn PDF document text
    • https://terekutididir.weebly.com/uploads/1/3/0/9/130969195/2316a.pdfIn PDF document text
    • https://gilabekavug.weebly.com/uploads/1/3/4/5/134597011/3699282.pdfIn PDF document text
    • https://sawotulexude.weebly.com/uploads/1/3/5/2/135298589/wilaxeno-luxiromusu-mewum-losuwelejug.pdfIn PDF document text
    • https://milefugi.weebly.com/uploads/1/3/4/3/134315772/0415d9c.pdfIn PDF document text
    • https://mibajajezek.weebly.com/uploads/1/3/4/0/134017497/4828824.pdfIn PDF document text
    • https://dujedagopodiku.weebly.com/uploads/1/3/4/5/134580966/6c0c67.pdfIn PDF document text
    • https://zikowipon.weebly.com/uploads/1/3/5/3/135300096/zivekaxebag_nowatuz.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/824fc0b1-d917-495f-9397-cada604b2611/how_to_get_your_journeyman_lineman_card.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ba87792-844b-42ae-8e98-41e100e68489/anket_doldurarak_para_kazanmak_doru_mu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/845de3bc-0802-4588-8c85-2162ad056f0f/organisms_are_classified_into_kingdoms_primarily_on_the_basis_of.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/486e9cdd-c97b-4020-8782-72a7458d5f7c/zubabepitafuxutare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92ac1e7d-a6a3-4763-b8ab-f541e3a12c94/ap_spanish_literature_practice_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a97228f7-6950-4841-84fb-6d8e66ecce7f/how_to_use_an_old_montgomery_ward_sewing_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b25d3c2-0f72-4a68-a6f4-b7a7d7c87b2d/irregular_verbs_examples_french.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db5f9c26-15bd-489d-bf50-a48b266694f5/87867634231.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0130424c-adcc-43f5-a1f2-fb4d8d2602b5/51579302234.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3de2f9fa-4d83-451d-80a0-effd7ba62830/23385897979.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d7a667b-01ec-4747-a009-3cf5d91a72fb/en_qu_formas_el_diseo_organizacional_impacta_en_la_competitividad_de_una_empresa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a360b9c-b455-4a3a-8578-5fcb6fa5dfd9/hip_hop_songs_to_dance_to_2020_clean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaa9989c-2e3a-498d-8ecc-a6ae7e836f47/fetefareb.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_off0000f16f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16F 5916 bytes
SHA-256: b110e25f5817bc4d61650256ada72a56b6f35d5c8a68e01d31f91f5bd766e070
font_01_sfnt_off0001057d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1057D 12796 bytes
SHA-256: 5e528de9b81b45922f1fc5fe640a4e3ffabaa03eb348b0e5c886aea36ecf07fb