Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ca2f61e755057b8…

MALICIOUS

PDF

59.3 KB Created: 2020-10-15 08:07:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: c2ac7377f24eb42d4cd0eeb1e346b0af SHA-1: ee0d8c0d612842669259bc2902e391502f478201 SHA-256: 5ca2f61e755057b884cc75b1f44c0b5287574d13015e9912e5514f17299ea429
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gettraff.ru/123?keyword=bukhari+sharif+in+urdu+jild+3+pdf In PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/2122744.pdfIn PDF document text
    • https://melegejisud.weebly.com/uploads/1/3/1/3/131379421/sokuwuw.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/ad9d4.pdfIn PDF document text
    • https://mijisurux.weebly.com/uploads/1/3/1/0/131070147/fakavugufoner_wezod_mudegujidefub_rewekup.pdfIn PDF document text
    • https://fanavepuru.weebly.com/uploads/1/3/1/8/131871984/4058666.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/dekegu.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/velowo_dakemolaku.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/3072351.pdfIn PDF document text
    • https://dejuxowiku.weebly.com/uploads/1/3/0/7/130738850/3898644.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/nukexifepejisox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366969/normal_5f87c6bc711e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368223/normal_5f876b9dba091.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f871c3d99f65.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/9536f2d6-c3fa-4ad1-b564-1173a80c9a51/58730194677.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f223bf29-f31b-4842-963d-48c5362f1859/zinumikatusijoraredibuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db6f350c-908d-44a9-994b-b3b74874098a/tamemaxiloba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f19057e-6018-4a0c-a5ae-dc0b6a363fdd/gotatufaparuzan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/981e6ff6-d5b3-4f3e-853b-a0a6eb1efc2b/biwenafakupupixijun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e11815f-170b-4b92-9c37-7c1093916d8f/nalititajijonuwira.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/586381dd-6a99-4c4d-a939-2be1c3c5055c/tegam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95513546-47c0-4e23-b30a-005e81ecb94e/mukugesexafepamiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92bcaa12-e711-4453-b6f3-3eb7f117d7ab/57907116482.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d639a5d8-743a-424c-a5bb-a4b0b7a3c504/parima.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1964485-bab9-44ba-9bcf-695ac1487886/94704977334.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed99ab86-9b76-4f8f-b4fb-350173d51f94/17944879475.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38f5f556-6b9e-4498-8eb9-8e5975ff3f22/99500993018.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000b545.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB545 23928 bytes
SHA-256: ff822fb93204ffd0e203cee960f418f40a816a6accb5609b680e373f6f7d089e
font_00_sfnt_off000076de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76DE 5480 bytes
SHA-256: 0e6545ca31a572e41905ee881c5c34b47f3bf91636a25be00baa3c03b23db694
font_01_sfnt_off0000897e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x897E 13864 bytes
SHA-256: b7fd7ad67390a281451d34a0f295e2c6a0f90afdae686cd11bd62613663fe113