Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fe445cd47c33e7e…

MALICIOUS

PDF

48.7 KB Created: 2020-10-14 20:23:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 345020c2eb7c967c883b2b7958e23d5e SHA-1: 7f1aecc005dcc5e64c56dcedf558d912c6fb778b SHA-256: 4fe445cd47c33e7ebeb040a37db96b51f223903adc7b0454ddbe600c5ec4316d
162 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a link farm designed for SEO manipulation. The primary lure appears to be a fake download for 'Youversion bible apk apps for android', which is a common tactic to trick users into clicking malicious links. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a malicious intent to redirect users to potentially harmful content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://ggtraff.ru/pify?keyword=youversion+bible+apk+apps+for+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366659/normal_5f871c627cd3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f87043215cdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366311/normal_5f8715c53eafc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f8708bb6eb0e.pdfIn PDF document text
    • https://site-1039672.mozfiles.com/files/1039672/19499328805.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/lopinudifegopotukas.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/guwonajikawow-tededireri.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/ff06dfdf.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/4842e5d1-3eb1-4218-b5e9-53e11745e9c4/devezaterejeditit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b3007b7-1ad9-4b0c-8e3f-0e386a7e847c/milogizisesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/447a364f-3646-4325-bd41-a0209b0716d3/budizekaruferilugemek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5697/1432/files/mischievous_kiss_love_in_tokyo_season_1_episode_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6991/3753/files/super_castlevania_4_rom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1931/2545/files/woning_huren_groningen_2_slaapkamers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7894/6468/files/76053937794.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/384709fc-dab4-4f8c-9f81-cdb6ed653993/81659862257.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64bb4533-561a-4bfc-ab7c-3bd281969ee6/bumajibupumerefolurev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05b9fb19-4c01-4c9c-a28d-b2945f4e300f/50648668941.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d723e34a-96af-4a7e-904a-22ba671229f5/37512305847.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
    • 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_off00006815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6815 5260 bytes
SHA-256: 2dca50816f54766bde27abfe0c72ed6d82940f313f209dae4cde9aada35f5a38
font_01_sfnt_off00007a05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A05 10820 bytes
SHA-256: 3f40fba121622c7c23ff3c59d00f91097e655989dccb89d8f08ecc7aacc97f88
font_02_sfnt_off00009f0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F0C 16488 bytes
SHA-256: 80be93857c82f9cd5c82e96270bcc04d003d91d413095c80f2f6c72d0aafd6e2