Malicious PDF — malware analysis report

Static analysis result for SHA-256 abac89a590dfec05…

MALICIOUS

PDF

91.2 KB Created: 2021-03-05 01:56:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: e1a085b7bf9026205908b0f57424ade1 SHA-1: b3b837ddaf1d97704e2cf57cf755813bc92a89c5 SHA-256: abac89a590dfec056aafb7f6cf66680ed2e3c0badef9bd0e6f17776b777abfb5
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs, 'https://zajinet.ru/strik?utm_term=how+much+for+a+2jz+swap', appears to be a redirector for further malicious activity. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to drive traffic to malicious or deceptive websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://zajinet.ru/strik?utm_term=how+much+for+a+2jz+swap PDF link annotation
    • https://wilalupesakugos.weebly.com/uploads/1/3/4/2/134235894/2971948.pdfIn PDF document text
    • https://cdn.sqhk.co/satukevaguka/ihiamvd/48189118695.pdfIn PDF document text
    • https://foworagajiwodim.weebly.com/uploads/1/3/0/9/130969946/3433034.pdfIn PDF document text
    • https://cdn.sqhk.co/nikazurokuv/dhe5hj1/79400969535.pdfIn PDF document text
    • http://uniques.space/gatute1g3hz.pdfIn PDF document text
    • https://cdn.sqhk.co/fiporalisu/Fkjiggu/9_months_game_gender.pdfIn PDF document text
    • https://cdn.sqhk.co/pujapipiwat/Rijghid/37213626302.pdfIn PDF document text
    • https://tirawinuzupufe.weebly.com/uploads/1/3/4/4/134445233/ee095804caf0f80.pdfIn PDF document text
    • http://winoorama.website/10739692173wef0e.pdfIn PDF document text
    • http://goods-amzon.com/gotomudezebowgkgfq.pdfIn PDF document text
    • http://dofukatejipoz.66ghz.com/shoot_to_thrill_ac_dc.pdfIn PDF document text
    • http://xititarosoki.iblogger.org/towonikejoga.pdfIn PDF document text
    • http://gatowixipeba.mywebcommunity.org/introduction_to_management_accounting.pdfIn PDF document text
    • http://leopards.space/depression_and_other_magic_tricks_espaolxjo6i.pdfIn PDF document text
    • http://tekplafond.xyz/96669992484fmc59.pdfIn PDF document text
    • http://bovewitavivebu.getenjoyment.net/james_allen_engagement_rings_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/kimejijomaki/iiULheA/video_downloader_for_tiktok_old_version.pdfIn PDF document text
    • http://novedexezenel.66ghz.com/how_many_carbs_does_dunkin_donuts_iced_coffee_have.pdfIn PDF document text
    • https://bepizapumi.weebly.com/uploads/1/3/5/3/135349865/8422733.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://kaloruligot.onlinewebshop.net/behringer_u-phoria_um2_usb_audio_interface_chromebook.pdfIn PDF document text
    • http://pelubameta.epizy.com/72076587052.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10217 5064 bytes
SHA-256: ce1a2afb93346ce63e885d4b150eb591b2d901aeeeef1faa3af2a1a8ca1c6b13
font_01_sfnt_off00011368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11368 11836 bytes
SHA-256: ea2bd5624b9f472c20ba0efcda67557a2ecab798ade520567b38f7beecb66fb0
font_02_sfnt_off00013b95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B95 16312 bytes
SHA-256: 028dbaa76d48ae99b02248bacea50134e27ed131f5dd39e25ac401de8961e19b
font_03_sfnt_off00015121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15121 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71