Malicious PDF — malware analysis report

Static analysis result for SHA-256 a65a27ff55261d46…

MALICIOUS

PDF

66.3 KB Created: 2021-02-15 09:02:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: aab6ff83d339ffd8bd8841f3e5de1a91 SHA-1: fa6a8bb3eec92271244bb02007abc3422cd4c108 SHA-256: a65a27ff55261d46c2ff5dcdb733759b7a2460edd370a7d3b485230b99e2a947
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to a calendar. The presence of many external PDF links, some pointing to potentially malicious infrastructure, indicates a link farm or phishing campaign. No scripts were extracted, but the PDF structure and embedded links strongly suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://yafferge.ru/strik?utm_term=marble+falls+calendar+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4424666/normal_602993c64afd7.pdfIn PDF document text
    • http://pabubojuboju.iblogger.org/brushed_aluminum_sheets_suppliers.pdfIn PDF document text
    • http://wowezixuxaxu.22web.org/brugge_belgium_tourism_information.pdfIn PDF document text
    • http://visatog.22web.org/jilapujewobukus.pdfIn PDF document text
    • http://jokidinavefo.22web.org/tangled_ever_after_480p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426675/normal_5ff04376063e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421471/normal_5fc7c82f38e90.pdfIn PDF document text
    • http://disesomudo.22web.org/nudube.pdfIn PDF document text
    • http://bamimutekinawaz.22web.org/shoe_size_guide_uk_us_eu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471082/normal_5ff8dc3f7378d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502464/normal_601bb21961292.pdfIn PDF document text
    • http://vijesojoruw.22web.org/wesib.pdfIn PDF document text
    • https://vadopesi.weebly.com/uploads/1/3/0/7/130738994/sasotodaxubiv_sajagimupepa_vemewugo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mamibis/s8_android_9_new_features.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/77054261483.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/skyscale_lost_guide.pdfIn PDF document text
    • http://goxonigugabuso.epizy.com/how_to_update_sqlite_db_in_android.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/easy_german_chocolate_sheet_cake_recipe.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_off0000c6a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A8 5436 bytes
SHA-256: 857525013b4e01bd91b642368a200e6335a414046c79023979db7e256174d472
font_01_sfnt_off0000d937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD937 10372 bytes
SHA-256: 9365af33b35e23362cfd288a38e2edeafa42ae8238f3f7f4d25ddbb71df63418

Open this report in the interactive analyzer, or submit your own file for analysis.