Malicious PDF — malware analysis report

Static analysis result for SHA-256 9414f898d6a184bd…

MALICIOUS

PDF

81.9 KB Created: 2021-05-30 04:36:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 86662428d1824bc48c0f19af808f27ca SHA-1: ebccebd02ae70322a40cb5a63a726d253ab646aa SHA-256: 9414f898d6a184bdfc263bdea657e0e5dfeb131c0eec7a3bf2a0d9a148a07c37
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains text related to 'calculator app for android' and authoring application details, which are likely lures to direct users to malicious sites.

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/123?utm_term=best+basic+calculator+app+for+android PDF link annotation
    • https://xazefobilizap.weebly.com/uploads/1/3/1/3/131384081/jujodowi.pdfIn PDF document text
    • https://dalideno.weebly.com/uploads/1/3/5/3/135384103/5314594.pdfIn PDF document text
    • https://rajoligegade.weebly.com/uploads/1/3/4/5/134504333/tosumafonukokonuk.pdfIn PDF document text
    • https://vevuwameran.weebly.com/uploads/1/3/0/9/130969214/394267.pdfIn PDF document text
    • https://jikeberu.weebly.com/uploads/1/3/1/8/131857846/vuwinogakeguv-jugavojiwavuze.pdfIn PDF document text
    • https://juderesovabivov.weebly.com/uploads/1/3/4/6/134680251/bakunelotizores-punojobo.pdfIn PDF document text
    • https://jadamoxor.weebly.com/uploads/1/3/5/3/135344742/vulalesobu_jilurusib_ximibe.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/b1b41ccc-37de-4abf-852c-58a60b9da160/damon_brand_words_of_power.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2b1244e-d16c-47ac-a438-5573295211ea/zomadowogeturo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/110aaed2-e883-4fee-93cd-6b9b09ac8d21/14293770322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5204a9a-1fc0-405d-ae60-1fa58201b20e/yoga_asanas_names_and_benefits.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bef29369-207a-4db5-b2d8-587d670325ff/71574630817.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ae39362-9eb2-4986-abe6-fe4fdfc0037d/22498937455.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0628f0da-204c-42de-a059-95d40058af27/79652283577.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d28af866-1977-42a8-918d-f80e973abc12/canada_national_sport_lacrosse_or_hockey.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fe43b5b-4b82-4f69-9a82-657d3efc7aef/what_is_self_destructive_behavior.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02028420-2664-41aa-9bdd-a180b81bdb8c/do_bernese_mountain_dogs_have_a_double_coat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b1a1b97-b187-4bc2-8b06-56fce09edd58/john_maxwell_leadership_bible_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0efa045a-cfe2-45b0-b872-f45f304a1c6b/64147242182.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_off0001035b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035B 5336 bytes
SHA-256: cf751494c502cb077688dd4f42f4d93d14e74424282113e9e890f4902e00e937
font_01_sfnt_off0001158c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1158C 10772 bytes
SHA-256: f270bd02b48061d0bacb8c76ea1656f820ab01dccb6a48627ee3367c92151168