Malicious PDF — malware analysis report

Static analysis result for SHA-256 a06d191c5e7ee3c4…

MALICIOUS

PDF

76.3 KB Created: 2021-05-19 22:25:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 07a4ad19b673ff7053e056e2a6d5db9d SHA-1: f76aaf0d00824bc97b5d00adbcb3f5e0b81e2803 SHA-256: a06d191c5e7ee3c4d6b12a6d4ed0172a5fa4bebd00046da0bb6f9c7aa820dee5
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a PDF SEO link farm. The primary malicious URL, https://midufefew.ru/strik, is likely used to distribute further payloads or redirect to phishing sites. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a phishing or trojan distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • 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://midufefew.ru/strik?utm_term=puppet+pals+2+android+apk PDF link annotation
    • https://filewefoxu.weebly.com/uploads/1/3/4/7/134750201/9001791.pdfIn PDF document text
    • https://vavodegan.weebly.com/uploads/1/3/5/3/135398560/affd0ba1.pdfIn PDF document text
    • https://dibevapanowodi.weebly.com/uploads/1/3/0/7/130776811/2059321.pdfIn PDF document text
    • https://nijifepobolo.weebly.com/uploads/1/3/5/3/135316947/gofefasunibiwo.pdfIn PDF document text
    • https://titerafutar.weebly.com/uploads/1/3/0/7/130775646/tobiduzege.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/dosalapasenow/kyocera_duraxtp_find_imei.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/how_to_see_my_rental_history_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a8540ce-eb93-424c-b264-bf7505c1a0f9/essentials_of_anatomy_and_physiology_6th_edition_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/418f9445-283f-470b-b1d8-d8eb77242f2b/95514132142.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/634a8c9c-ed03-4cb7-b3e0-edac8b6a665b/malayalam_poems_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/nunefetedazowulot.pdfIn PDF document text
    • https://s3.amazonaws.com/wowonesoribu/vexewinopuridefav.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/48976160342.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/pikulejusotalitoluwodofa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7b060c2-bca4-49ad-aa8b-16314981f515/81153267853.pdfIn PDF document text
    • https://s3.amazonaws.com/furunumaroxun/33252636026.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e254e27a-2649-48db-abb2-2a6e19b08716/sorebuwadej.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/84190127039.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4616a9f0-59b1-4e8b-acfd-d461fe960f34/kijurigave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53bc6674-1c2a-4ff1-bfce-f2b9c2e94314/arunachalam_movie_download_tamilrockers_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a49ca394-a59c-459e-86a9-d147301b0119/iphone_no_sound_even_though_volume_is_up.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b258d1a-1d28-44bf-b595-bb65ee9d244b/mamuxev.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_off0000ed69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED69 5152 bytes
SHA-256: 0b1a8caa30b4af5551272a271ba51ecc2bc70da0200f89497d7de93ba7bf79e2
font_01_sfnt_off0000fefc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFC 10864 bytes
SHA-256: 64801b6d2d1e3238a17431f69a657c69a5300d92617146643515321b5cf703e1

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