Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7f9c86a753c6ef7…

MALICIOUS

PDF

76.5 KB Created: 2021-05-12 20:43:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: a9a4bd0eec7c8d3bdccd46e9285b1364 SHA-1: 7572bd98ea918a7909d08cc132eab43c55b22d6a SHA-256: b7f9c86a753c6ef7217d80830582f58969146891df4f6c2b13f75691c01e3e5b
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 pointing to known malicious redirector infrastructure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search results or distribute content from various sources. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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=how+to+reset+intermatic+light+timer In PDF document text
    • https://jiburivaduvu.weebly.com/uploads/1/3/4/4/134473865/2cc06d41.pdfIn PDF document text
    • http://dexaputanit.mygamesonline.org/vitokomamaronodejosepozuj.pdfIn PDF document text
    • http://bukobaxaz.getenjoyment.net/small_rainbow_fish_species.pdfIn PDF document text
    • https://kenometiwu.weebly.com/uploads/1/3/4/3/134340836/gupaderomatezelizij.pdfIn PDF document text
    • http://budivev.scienceontheweb.net/earl_nightingale_19_minutes_checklist.pdfIn PDF document text
    • http://jiwimejikigigu.mywebcommunity.org/symbolic_interaction_theory.pdfIn PDF document text
    • http://ladunosim.sportsontheweb.net/2325194075.pdfIn PDF document text
    • http://jabilevij.mypressonline.com/19463900755.pdfIn PDF document text
    • https://xijeruwenuvu.weebly.com/uploads/1/3/4/0/134018409/wofexomarixilexifez.pdfIn PDF document text
    • http://mmamba.ru/how_to_get_an_autodesk_student_license3a350.pdfIn PDF document text
    • http://mexicotop.xyz/what_is_mep_shop_drawingsdfacd.pdfIn PDF document text
    • https://fezagigix.weebly.com/uploads/1/3/0/8/130813643/e36ee96524f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jokubamobivavum.onlinewebshop.net/are_dyson_vacuum_attachments_universal.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/58433320146.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/angry_birds_2_full_movie_1080p.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/borland_c_builder_6.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/light_on_pranayama_bks_iyengar_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/kanederad.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE086 5052 bytes
SHA-256: 71da0d17a516433dbf6a2c8f1324cb3906eff76c29a276b43f0e8366bfd9b0d6
font_01_sfnt_off0000f189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF189 10780 bytes
SHA-256: 808c332c0ebb8ce55c152a13df28e0a54dfaab997aaa216576e908ccf89071fb
font_02_sfnt_off00011686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11686 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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