Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c3d94b49df44d32…

MALICIOUS

PDF

92.4 KB Created: 2021-03-23 00:30:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 63c50693c9a247614ef30efbe1be54dc SHA-1: 10c795ea77ead7fd6998ed2e932eef1984168fb3 SHA-256: 0c3d94b49df44d326bf5193717c1b96bdda0fbad0159eac4ac2101e4d62e4c7d
134 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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
  • 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://fokemale.ru/123?utm_term=free+printable+cafe+menu+templates PDF link annotation
    • http://autobaff.xyz/kimodogy0ck.pdfIn PDF document text
    • http://galosidijixiwu.mypressonline.com/10269863212.pdfIn PDF document text
    • http://metazoaapc.fun/rogujebalagubobopukoku6h7c.pdfIn PDF document text
    • http://nasty666.space/vupemuluwozadozh5z1.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/7f48677b-e096-4d62-90fc-fabadf4e0640/what_is_a_speech_preparation_outline.pdfIn PDF document text
    • https://c504e2ef-f928-4e80-b5b1-fc05046f432e.filesusr.com/ugd/247f25_68baf894dd6c45c6b4b14a0f1f2b3719.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9afc68f5-c80d-4666-bccf-9096079241b6/how_to_enter_wps_pin_into_arris_router.pdfIn PDF document text
    • https://24451074-f53b-4065-993c-779ba3957988.filesusr.com/ugd/0ae25f_0f8224a4903143bdbbcd16c3f1258d04.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a879911f-dd02-47f7-b08e-6d0759aa349a/sazixapakusafekajarefega.pdfIn PDF document text
    • https://d046670e-94b8-4ea2-8efc-69fca9b502c9.filesusr.com/ugd/c0b427_44edb4f00ea64196a8aef63150790dd2.pdf?index=trueIn PDF document text
    • http://gejizejaniwijef.atwebpages.com/12938933880.pdfIn PDF document text
    • https://6754c94d-8795-460a-880d-d127bb37d4d4.filesusr.com/ugd/2383dc_63249406d1e44612b9e60ef42902fdd5.pdf?index=trueIn PDF document text
    • https://dd67658a-cc17-4e1c-bca5-42bf299a485b.filesusr.com/ugd/07a440_0d681d010cef49c68115d5167866c82b.pdf?index=trueIn PDF document text
    • https://1fa67a36-2e8b-44cc-a955-751d80433762.filesusr.com/ugd/d85e51_2698519bacf847d9a9628d417234c003.pdf?index=trueIn PDF document text
    • https://d920bd67-dfaf-4c99-85b0-fcb8118dfb91.filesusr.com/ugd/383849_b52b6da0d8284623a251793062c63c37.pdf?index=trueIn PDF document text
    • https://e824aeac-d22a-4b45-bb3c-17051d6ee04f.filesusr.com/ugd/de60da_4ecd08e0df7e4df4ad46d4cbb8ad6d2e.pdf?index=trueIn PDF document text
    • http://wesatume.atwebpages.com/warcraft_3_original_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5a2aa92-5bd2-4af2-84a6-ca2d1d20066e/why_buildings_fall_down.pdfIn PDF document text
    • https://460eb545-5389-4aa9-9e78-d1074a8bca0c.filesusr.com/ugd/21a131_b517bde87d8d480aaebabc6eaa5bf3b3.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001146c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1146C 5256 bytes
SHA-256: 041dcaaf7585779697d6f81a4111b465e723b0c71dbc6a039f13f3e523bedb6e
font_01_sfnt_off00012638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12638 11504 bytes
SHA-256: 4a7f5f6893c150827626efdb9c9983df19dfbc669b33fb915d67cbc236d9c24a
font_02_sfnt_off00014dbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DBE 16068 bytes
SHA-256: 9e1271d681207e96fe60c94df920a27091a957dc81e2614e9e6235263a34fce6