Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d1675bfe14669eb…

MALICIOUS

PDF

96.8 KB Created: 2021-02-02 13:02:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: bd5e9bed29eaefc9ee4622e7370b524b SHA-1: 0313f00e8eb538377194f503081bbf0871755f5a SHA-256: 3d1675bfe14669eb2ccdb79fd609c0a254a80a381d756ea6c0b14d8c913994c5
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many pointing to disposable domains and Weebly-hosted files, indicating a link farm or SEO spamming operation. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The embedded URLs suggest a potential distribution mechanism for further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://jottigo.ru/wb?keyword=spreadsheet%20compare%202019 PDF link annotation
    • https://zitidimesefe.weebly.com/uploads/1/3/1/6/131606065/62d87.pdfIn PDF document text
    • http://probmaka.tech/sedukukagizatumofvrhem.pdfIn PDF document text
    • http://ompala.store/tixosabubudaborejuvewuba4pld8.pdfIn PDF document text
    • https://jaxevilin.weebly.com/uploads/1/3/1/6/131606955/23b117.pdfIn PDF document text
    • https://voruvagozi.weebly.com/uploads/1/3/4/7/134742827/84ba2.pdfIn PDF document text
    • http://organic100.fun/vuwujatidokodutibuwijuxedx7dfx.pdfIn PDF document text
    • http://sweetmeet.online/wixatutilofqauq.pdfIn PDF document text
    • https://buparemekixa.weebly.com/uploads/1/3/0/7/130739227/nebobekegunorawama.pdfIn PDF document text
    • http://bloodcraft.online/90374459277lh0cr.pdfIn PDF document text
    • http://itanah.space/74112059998nfus6.pdfIn PDF document text
    • http://unreguezff.rest/kubenofalirok0j886.pdfIn PDF document text
    • http://beamorem.com/75378185213a6q15.pdfIn PDF document text
    • https://sumejuloluguwir.weebly.com/uploads/1/3/5/3/135390827/bodup_wejamugafuriw_zorasumer.pdfIn PDF document text
    • https://kitedagipan.weebly.com/uploads/1/3/4/8/134892955/4416653.pdfIn PDF document text
    • http://gsmall.space/27194722935xhscw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452850/normal_6012e7a93b0c4.pdfIn PDF document text
    • http://shishkin-seed.xyz/taxasoverofigetanosuwudj2mcc.pdfIn PDF document text
    • http://scrlt.xyz/no_crop_spiral_photo_editor_filter_effectscxtsv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012cab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CAB 5500 bytes
SHA-256: 6f2fda0f8d334c8009823a521fd443f057a8899206a2d8a09c252c23d891d2a6
font_01_sfnt_off00013f52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F52 11964 bytes
SHA-256: 44581a5c48f7ae604b76f57dc3166aebea8b484df34a83e8104cad2081fed2da
font_02_sfnt_off000167e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167E6 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

Open this report in the interactive analyzer, or submit your own file for analysis.