Malicious PDF — malware analysis report

Static analysis result for SHA-256 897e6d04f5e158ae…

MALICIOUS

PDF

75.4 KB Created: 2021-04-09 05:03:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3acf1ee9025e7dd201ec1d0b61465301 SHA-1: f3d98441fafdd00ce1749a4c504e5cb1db64c949 SHA-256: 897e6d04f5e158ae80fc30aa5608188fa1313eda7027cf86d56e6dc36d7e4dd3
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm designed to distribute malicious content or conduct phishing. The presence of a UTM term in one URL indicates a potential tracking mechanism for malicious campaigns. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate malicious intent, likely related to phishing or malware distribution.

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://maypoin.ru/strik?utm_term=garmin+nuvi+3597lm+manual PDF link annotation
    • https://gojenejanoz.weebly.com/uploads/1/3/0/7/130739654/jibafevi.pdfIn PDF document text
    • https://cdn.sqhk.co/dekaroku/FjTuHif/38692109948.pdfIn PDF document text
    • https://musabonaxuzu.weebly.com/uploads/1/3/2/8/132815830/0a6163.pdfIn PDF document text
    • https://pidesetax.weebly.com/uploads/1/3/0/7/130739971/3939610.pdfIn PDF document text
    • https://pelepidavivi.weebly.com/uploads/1/3/1/4/131454492/0435d9f84.pdfIn PDF document text
    • https://ludalobupum.weebly.com/uploads/1/3/4/5/134528654/valixe.pdfIn PDF document text
    • https://cdn.sqhk.co/jukelifawap/70au0ja/fegosulozosaxedelozonage.pdfIn PDF document text
    • https://kogezuzoxato.weebly.com/uploads/1/3/1/0/131070880/nizilamup-zigipeg-gibenezigol.pdfIn PDF document text
    • https://fosaxobe.weebly.com/uploads/1/3/4/8/134882536/fivovezulu.pdfIn PDF document text
    • https://zojopufowe.weebly.com/uploads/1/3/4/5/134523349/jivoketagenix.pdfIn PDF document text
    • https://bopidojosonek.weebly.com/uploads/1/3/1/3/131384153/panilusix-pomuvoluv-garuxani-damet.pdfIn PDF document text
    • https://lepuzabokagat.weebly.com/uploads/1/3/4/3/134333079/kezageripupozej-tajepakoxuw-nepater.pdfIn PDF document text
    • https://nelizebowi.weebly.com/uploads/1/3/4/7/134734992/timofixiluwevigi.pdfIn PDF document text
    • https://nalabusapigo.weebly.com/uploads/1/3/2/7/132740218/8107679.pdfIn PDF document text
    • https://wuzinetasinozud.weebly.com/uploads/1/3/1/6/131606123/bf2774c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b6086c54-8ef4-40f3-ba18-bbbb993b339e.filesusr.com/ugd/36e927_a83ff8e1d03c40cb813801af1ce1ce9b.pdf?index=trueIn PDF document text
    • https://5366dd3f-28a3-4342-b8e5-5bed86455aec.filesusr.com/ugd/a92322_e547e2ade44d4aefa9b83791588c2a0a.pdf?index=trueIn PDF document text
    • https://d71fc03c-aea6-48f7-a990-8afffb22108d.filesusr.com/ugd/3de8a6_2c50671631b547a294420d688152adcd.pdf?index=trueIn PDF document text
    • https://5bf49506-6ef1-42f8-8f90-7e3689255fd3.filesusr.com/ugd/8fe1bf_4c3ed2463acc4bb29d6c6d9dbe48969a.pdf?index=trueIn PDF document text
    • https://e25b7b56-d8f7-44cb-9276-56428e53d1cc.filesusr.com/ugd/63f3e8_83d1efe025374d1081d20f53bbf08e4c.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_off0000eb0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0B 5268 bytes
SHA-256: 29994a01b86cb194c885f8db8d085390614cdfed8e70ba47dfdd4c1b09d8e959
font_01_sfnt_off0000fcf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF3 10328 bytes
SHA-256: 9b5bd1e748f4e0d507881371c9e1e7fa4a2eda1a6e032c705aa58f3fd104ba15