Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaef54c1021b66de…

MALICIOUS

PDF

98.5 KB Created: 2021-01-18 07:45:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 5b7ea91820aa19ff30a9b4c4aa58e0dd SHA-1: 367f51a9a03fa8c6a0b83e3b9cc6b0a37bc7b076 SHA-256: aaef54c1021b66dec47a04b8ceee3712f435c0dd5b4dc62083a8409b4af31986
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains keywords related to hacks and software, reinforcing the lure.

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 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://traffking.ru/123?utm_term=cookie+clicker+wrinkler+hack In PDF document text
    • https://cdn.sqhk.co/menasimax/roifhew/24000628782.pdfIn PDF document text
    • https://site-1175878.mozfiles.com/files/1175878/enquiry_form_template_excel.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/geMhggd/kurenupisutatogatawok.pdfIn PDF document text
    • https://site-1246416.mozfiles.com/files/1246416/regosom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465555/normal_5fdb58c52c638.pdfIn PDF document text
    • https://site-1175642.mozfiles.com/files/1175642/xekikaminisedamamufa.pdfIn PDF document text
    • https://cdn.sqhk.co/pevukoza/jfKIphc/72889078227.pdfIn PDF document text
    • https://cdn.sqhk.co/suxumeva/HKJ5Ugh/35468491975.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482860/normal_5fbce62a63f78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453764/normal_5fb3b67e9e896.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378846/normal_5ffeb3729f6e8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wawuzir.epizy.com/du_battery_saver_pro_apk_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/keller_williams_business_card_template.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/vozitixotojoxesomato.pdfIn PDF document text
    • http://jaziwovapotulit.epizy.com/translation_reflection_rotation_transformation.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/cb_edit_background_2019.pdfIn PDF document text
    • http://sewekovekejir.epizy.com/free_car_service_check_sheet_template.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/meterpreter_android_without_apk.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012d86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D86 4772 bytes
SHA-256: 0a45e2375b1f9ec83f9803979526e3245c0ce47dfa0af1cceee6238b57fc77b1
font_01_sfnt_off00013dc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DC9 11856 bytes
SHA-256: 0b9e026978956053ca863e79635c2e2ad5c7203992a13dfa17fc65fe7bace2ae
font_02_sfnt_off00016667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16667 16388 bytes
SHA-256: 534e44c921e8acb9c8e993207df297c85ca6c672af4c6174c05b3ca24a170572

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