Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab1d9426a26c8b5c…

MALICIOUS

PDF

71.9 KB Created: 2021-03-24 00:41:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1fab210ab0b08647618fc4cffde0c701 SHA-1: 22cc6bf292885f58f36b3cd00708f074865c40f2 SHA-256: ab1d9426a26c8b5c11c736b071a2ab06a595ef05cdcc95232fb91b8249266de1
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The embedded URLs and the heuristic firings indicate that this document is designed to redirect users to potentially malicious websites, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/award?keyword=the+panov+botvinnik+attack+move+by+move+pdf PDF link annotation
    • http://mazipuvaxa.mywebcommunity.org/xipuzanakereg.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefima/idhajOF/drill_master_4._8v_cordless_screwdriver_battery_replacement.pdfIn PDF document text
    • http://wegoduxevuda.iblogger.org/67788085636.pdfIn PDF document text
    • https://cdn.sqhk.co/pibilebomek/yhbi14k/no_button_jeans_mens.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/qCyRcJP/fdic_call_report_glossary.pdfIn PDF document text
    • https://cdn.sqhk.co/dikapagoloza/idihgIz/idle_tuber_empire_apk_day.pdfIn PDF document text
    • https://cdn.sqhk.co/perigupa/3jeJhhB/agent_orange_awareness_month.pdfIn PDF document text
    • https://cdn.sqhk.co/wuxobilan/eihiZja/idle_lumberjack_3d_hack_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/vavetiset/dhe7icQ/6807671815.pdfIn PDF document text
    • https://cdn.sqhk.co/vameduvide/gejjvic/snake_game_unblocked_cool_math.pdfIn PDF document text
    • https://cdn.sqhk.co/rijizedot/cMhakje/mediwesuduwujuvuwexepi.pdfIn PDF document text
    • http://pinegobojefo.getenjoyment.net/how_to_load_a_bobbin_singer_stylist.pdfIn PDF document text
    • http://fidofawi.medianewsonline.com/how_to_keep_egts_down_6.0_powerstroke.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f26e6bca-ce10-4524-9610-ed5ef7c8d48b.filesusr.com/ugd/ac8c68_cd2b840c28ba4fc3b72de3c2129989d3.pdf?index=trueIn PDF document text
    • http://bijiwamosijiw.epizy.com/vegam.pdfIn PDF document text
    • https://88749095-6fd7-453f-8e8a-15b48fe47dd1.filesusr.com/ugd/e4d7df_3674b1c7c16643289be4909fa0191c76.pdf?index=trueIn PDF document text
    • https://f238abdf-92e3-4651-90df-65b6e8a648d9.filesusr.com/ugd/99965f_84abbc4898f542e18245676ad1b00c39.pdf?index=trueIn PDF document text
    • https://ddb0fe67-a09a-413d-b59a-c21b1dde3186.filesusr.com/ugd/3f0e57_a0fc09bda0c74914a5bd27c71e08332e.pdf?index=trueIn PDF document text
    • https://21036261-01f9-4725-a342-2b8b08d10099.filesusr.com/ugd/d0cbc4_4f26363ae1e1486093cf0c6eecfffb20.pdf?index=trueIn PDF document text
    • https://45e41439-46a4-4c97-84f0-155cfeda4cef.filesusr.com/ugd/9d7ad9_2cda660c19954f9d8679594b379d359c.pdf?index=trueIn PDF document text
    • https://959e49da-b405-4961-97d4-5c1bb2e9a628.filesusr.com/ugd/ab0441_f72a6adf9a204475ab676d7c0dccc9f2.pdf?index=trueIn 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_off0000da37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA37 5404 bytes
SHA-256: de1a36866152123db8d7ed0211c12767e452c8c77e39be9a2d725e81bb659f31
font_01_sfnt_off0000ec83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC83 10976 bytes
SHA-256: 657c3bee7737242a892a0add7a99ce4e159cc2e744c2754d8fdc1c7cf283703c