Malicious PDF — malware analysis report

Static analysis result for SHA-256 01504d0ec42fe7a3…

MALICIOUS

PDF

88.9 KB Created: 2021-03-29 07:00:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a733fa0c6aa66e6e99fe89deb91e847a SHA-1: e8baf900dda5df85d06b288e1a11674db7bfd8a8 SHA-256: 01504d0ec42fe7a3ef1335dfa198277e9ba4c6312fc4d91a30f2f1a8f1e455c8
244 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to disposable hosting or known malicious redirectors. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=the+story+of+paul+bunyan+pdf In PDF document text
    • http://jatepemiv.22web.org/27667385152.pdfIn PDF document text
    • https://xilivixawigilu.weebly.com/uploads/1/3/4/6/134672458/totizaguge_lebuj.pdfIn PDF document text
    • http://jojenulowivot.22web.org/fagebetorunuribo.pdfIn PDF document text
    • https://xopekasas.weebly.com/uploads/1/3/4/7/134748476/didafikubefuji.pdfIn PDF document text
    • https://gikovasedubum.weebly.com/uploads/1/3/4/5/134507074/suzug.pdfIn PDF document text
    • https://panebafizi.weebly.com/uploads/1/3/4/3/134365464/nopozarowime.pdfIn PDF document text
    • https://lelunoforonu.weebly.com/uploads/1/3/1/6/131606056/vapekesipif-gamufuvasetom-samolojaluba.pdfIn PDF document text
    • https://wekubobezug.weebly.com/uploads/1/3/1/3/131383536/898f73b37309.pdfIn PDF document text
    • https://paxuxitusokewu.weebly.com/uploads/1/3/1/3/131380341/da216e046.pdfIn PDF document text
    • http://vibawukukar.iblogger.org/tunasudomu.pdfIn PDF document text
    • https://xevupuwikuguv.weebly.com/uploads/1/3/0/8/130814145/6535666.pdfIn PDF document text
    • http://tonozezoziw.iblogger.org/baking_paper_sheets_uk.pdfIn PDF document text
    • http://kejamezegujoz.iblogger.org/vscode_format_html_not_working.pdfIn PDF document text
    • https://pusuranan.weebly.com/uploads/1/3/4/5/134598414/6388718bd6503e7.pdfIn PDF document text
    • https://vuveresob.weebly.com/uploads/1/3/4/5/134589217/napugowupel_nisowun_favavu.pdfIn PDF document text
    • https://jedopebo.weebly.com/uploads/1/3/4/8/134889916/8144749.pdfIn PDF document text
    • https://vasetovomakoti.weebly.com/uploads/1/3/2/7/132741031/sonapiwuroxu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jejafajiw.rf.gd/larebolasajazezulitaji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd391992-ddeb-4c91-ba4d-c4de78a9431f/renumuziw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a70ac934-9fb7-4dc4-9fed-4753995503c1/who_is_john_maxwell_author.pdfIn PDF document text
    • http://lelekon.epizy.com/48309449148.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b627eaf-6278-415b-9196-32e36aa51a2c/arduino_uno_kit_components.pdfIn PDF document text
    • http://jisizogazojebin.rf.gd/14596304900.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_off00011b85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B85 5320 bytes
SHA-256: 8f6e1805d95a69907148a16f8e338827f0020e33df1396ae7689dd54ea3d55de
font_01_sfnt_off00012d91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D91 11544 bytes
SHA-256: 654421545509b0aa20b8f427da0794561ec6c14a866a33a2db4111ae78559f75