Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f85bdd4885f49a…

MALICIOUS

PDF

74.9 KB Created: 2021-03-25 17:34:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 14a050c9862b06e139a533671c3ba228 SHA-1: b52607709c1d4e57ef05630413def117766a0f29 SHA-256: f0f85bdd4885f49aa2dadb67d45c0ed9b070401d3616d90ba35e49fae5ead76d
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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. Specific URLs and indicators for this sample are listed in the indicators section.

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/award?keyword=dilute+phase+pneumatic+conveying+system+pdf PDF link annotation
    • https://bifixebuwo.weebly.com/uploads/1/3/0/7/130776276/kezes-zupavereguk.pdfIn PDF document text
    • https://cdn.sqhk.co/golemejexeno/Qkidji8/vomiting_covid_child.pdfIn PDF document text
    • https://jevamupoledi.weebly.com/uploads/1/3/4/7/134712268/jusopifimom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490949/normal_6041f179cbaa3.pdfIn PDF document text
    • https://mawobomogagot.weebly.com/uploads/1/3/4/1/134109187/polivutobekew_tafinomufobu.pdfIn PDF document text
    • https://cdn.sqhk.co/gukawaki/gjgjjys/dowix.pdfIn PDF document text
    • https://vemomomofaj.weebly.com/uploads/1/3/2/7/132740815/vozexuxexilibu.pdfIn PDF document text
    • http://chuvashovfamily.ru/55067476379l4mp4.pdfIn PDF document text
    • https://liletizotefos.weebly.com/uploads/1/3/4/2/134234842/japuve.pdfIn PDF document text
    • http://martakkord.ru/81952597149f7ieb.pdfIn PDF document text
    • https://cdn.sqhk.co/vijamabaf/ia0cSjg/hero_bansuri_instrumental_ringtone.pdfIn PDF document text
    • https://bijararavi.weebly.com/uploads/1/3/4/5/134587429/mawopa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412999/normal_5fdb0540d390b.pdfIn PDF document text
    • https://dojiladise.weebly.com/uploads/1/3/1/3/131379401/nadasejol.pdfIn PDF document text
    • http://womenit.space/bubble_gum_simulator_script_gui_20203w1ck.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/e01ab1c7-e4e0-4ef7-8ffc-4969b50f4757/30760752126.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90eac79c-2ac0-484f-b997-8bb895df4a03/maze_runner_1_full_movie_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5ba93c8-58c6-459a-abee-50c393cdd9c2/vuzaledejarerunesalag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e089154-959f-4660-9949-d70862f6d78a/nugolexasi.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_off0000e7b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B1 5636 bytes
SHA-256: 8d8b031cf6acd5267aad9500dc5a684929b6de01bb9f8925af9c8ca9461fd8c9
font_01_sfnt_off0000facc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACC 10364 bytes
SHA-256: 4b11184c40715fc5b84b37099f1ac543d0f194053eef14e78111384b7de3164b

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