Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bae63a56b86c0f8…

MALICIOUS

PDF

74.0 KB Created: 2021-06-08 06:51:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9e786e3b8e3dca9157720f25d6b83bd4 SHA-1: e3bb726159946a6d5d5a1840de5d02bca5dd02d0 SHA-256: 7bae63a56b86c0f89d65f76fe7490150144a2c57288e1e7b09de876a6350c385
186 Risk Score

Malware Insights

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

This PDF document is classified as malicious and a phishing trojan by ClamAV. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing campaign. The document body is heavily obfuscated, but the presence of embedded URLs and the heuristic firings indicate an attempt to redirect users to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://allytemp.ru/pbw?utm_term=how+to+use+the+hoover+power+scrub+spinscrub+50 PDF link annotation
    • https://jasuxazej.weebly.com/uploads/1/3/4/8/134875243/3369062.pdfIn PDF document text
    • https://kezexawu.weebly.com/uploads/1/3/0/8/130814062/digopad.pdfIn PDF document text
    • https://fexagire.weebly.com/uploads/1/3/0/7/130775556/9e1f1727.pdfIn PDF document text
    • https://liwitozawaben.weebly.com/uploads/1/3/4/0/134042828/fozoju.pdfIn PDF document text
    • https://gobadinemi.weebly.com/uploads/1/3/5/2/135299992/bolerudalurasej.pdfIn PDF document text
    • https://jodawozuwiki.weebly.com/uploads/1/3/1/4/131437728/lapotufe_nepizenawaxituf_patewuvevo.pdfIn PDF document text
    • https://xibuzapesajeg.weebly.com/uploads/1/3/4/2/134236274/9586862.pdfIn PDF document text
    • https://rifejirofedum.weebly.com/uploads/1/3/4/7/134763588/8503734.pdfIn PDF document text
    • https://zisuwurelexutik.weebly.com/uploads/1/3/4/6/134668326/95285db0.pdfIn PDF document text
    • https://mixorone.weebly.com/uploads/1/3/1/4/131438240/04ca02fd53aef38.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pezaloribed.pbworks.com/w/file/fetch/144628377/pijigones.pdfIn PDF document text
    • http://kokoxudalux.pbworks.com/f/rajifanovexanisemafezeku.pdfIn PDF document text
    • http://jujirafamena.pbworks.com/w/file/fetch/144465249/85414886430.pdfIn PDF document text
    • http://pokatufaxi.pbworks.com/w/file/fetch/144818520/giwogapunujol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/517f8cc8-02a1-4653-ba83-0a226aa95cdb/r_sreevani_mental_health_nursing_book_4th_edition.pdfIn PDF document text
    • http://bojirakaj.pbworks.com/f/sportcraft_electronic_dartboard_instructions.pdfIn PDF document text
    • http://jadubunid.pbworks.com/f/google_sheets_travel_expenses.pdfIn PDF document text
    • http://felefejimax.pbworks.com/f/metitulanokibumatewilul.pdfIn PDF document text
    • http://gufabewa.pbworks.com/f/zabetumiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14ce21ae-94dc-41b7-9ad9-111a64a57888/how_do_you_critically_appraise_a_research_article.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_off0000e1c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C7 5300 bytes
SHA-256: 12cdcc2561635a185d17fda10c1be92a123bc75343ade6e906834b5092017086
font_01_sfnt_off0000f3e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E5 10812 bytes
SHA-256: 00598d67d3cdfa247331e34c7d1630c8451c72d33a7aa176267e739216c9bda7

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