Malicious PDF — malware analysis report

Static analysis result for SHA-256 92ae05c2e19ad37f…

MALICIOUS

PDF

78.1 KB Created: 2021-05-23 16:50:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 49f1aad23f4614fb64ba50bcb209d84a SHA-1: 13d80cb743e88a6557f8bbb619049cc705a5dd8a SHA-256: 92ae05c2e19ad37fc39626fc864377ec877c57e53c1c554f3737dae25dbd51d7
222 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, routes users through malicious redirector infrastructure 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 0.9991

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
  • 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://yafferge.ru/strik?utm_term=myles+munroe+pdf+waiting+and+dating In PDF document text
    • https://static.s123-cdn-static.com/uploads/4366676/normal_5ff9d86b2007a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447914/normal_6035cf5cb3eb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422914/normal_6041c807bc57e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366949/normal_600ebe3cc7c13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467003/normal_6050d34ce1f9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387709/normal_5fd200ddafb96.pdfIn PDF document text
    • https://zirorimasarikar.weebly.com/uploads/1/3/4/1/134108573/resukifine_mugarudoxuxega_gesirufexu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469850/normal_604b70c41e13d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467593/normal_6026086d193f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380084/normal_6014251981187.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489993/normal_60537380d0783.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460447/normal_602ce041a8f2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380082/normal_5fd1d656163e9.pdfIn PDF document text
    • https://vawegoti.weebly.com/uploads/1/3/0/8/130874218/wigojitigokote-bolev-labojezeke.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zuwosil/fivesurigoletimuruk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a0415bc-f963-444c-960d-8b9958470249/bulenegobotumo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dd6a1e2-1afa-470b-aed1-94b9f59d58a9/lukoxenotol.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/mimipuxejebu.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/age_of_sigmar_stormcast_eternals.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/belopujorusi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e55a34f-438a-463a-b8cb-bae2a36e9537/67545030762.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/bacterial_plaque_biofilm_formation.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C7 6744 bytes
SHA-256: b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808
font_01_sfnt_off0000e4ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AC 5560 bytes
SHA-256: edd954b8327e2fa69b29b122a063d87b7523d550246ab8bb12d8ce50b334c0d2
font_02_sfnt_off0000f79b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79B 3436 bytes
SHA-256: 1ca96656e2bb9abdc0ad6b5cab00e5875e4a429d87d9b927e20bd38dc1032de5
font_03_sfnt_off0001054d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054D 10872 bytes
SHA-256: 0a95ef29d135f71f944e20919ae30da0ca960d0bd388f844651b27a11b411e14