Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d04de120095a0dc…

MALICIOUS

PDF

71.4 KB Created: 2021-06-01 09:11:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4609f0685f218c998b1d242acaf49773 SHA-1: 536103e3048ab9a72cd86eb04e7a3e7cc5138bc1 SHA-256: 3d04de120095a0dc854463a2146955fa9adb8c0f3654f272667eee519faff3c2
194 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 0.9996

Heuristics 7

  • 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 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
  • 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://pixomot.ru/pbw?utm_term=principles+of+managerial+finance+14th+edition+solutions+manual+by+gitman+zutter PDF link annotation
    • https://tejekukukageza.weebly.com/uploads/1/3/4/6/134662245/27f9bb.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4417222/normal_60b14d3ee5dd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422640/normal_60261c6e8b0c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492259/normal_601233f44a0ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452587/normal_5fcbae9a70f59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370985/normal_603e275ff3929.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388063/normal_604d722f6b810.pdfIn PDF document text
    • https://bufudelazevel.weebly.com/uploads/1/3/4/7/134734798/padamanow_lomotuvanob_tasofasuvume_kilojowuxosu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426408/normal_60170d357a837.pdfIn PDF document text
    • https://limekawovod.weebly.com/uploads/1/3/4/5/134529432/7f3a9c528.pdfIn PDF document text
    • https://rudunusom.weebly.com/uploads/1/3/4/6/134602981/lumopo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370317/normal_5fe2f820cc103.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402720/normal_603eaeafb5208.pdfIn PDF document text
    • https://keladita.weebly.com/uploads/1/3/0/7/130739570/9096ba78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463275/normal_605e12d951b7d.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/7f52952b-6d76-4325-a9d6-308fda6f850d/how_do_i_know_if_my_oven_igniter_is_bad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97e87b97-cc30-41a1-8aeb-62c82516b109/tipping_point_radio_scott_mckay_revolution_radio.pdfIn PDF document text
    • http://bupataved.pbworks.com/w/file/fetch/144427641/44441507535.pdfIn PDF document text
    • http://zepadatoju.pbworks.com/w/file/fetch/144416121/62949240049.pdfIn PDF document text
    • http://zezimin.pbworks.com/f/gw2_raptor_mount_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d09a4840-851d-45d1-9751-6ae208056afb/giporamokejepu.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_off0000d6b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B6 6004 bytes
SHA-256: 6c29b01c4b9ae90afe170bd51549d409862fd1e71ba3c96ccf14225ab8332002
font_01_sfnt_off0000eb10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB10 10552 bytes
SHA-256: 4f79f63021da39cfda0e44832ff23c4e1f6e9338955a1fa88ad013c9d66ccf66