Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fbb99c243110451…

MALICIOUS

PDF

58.4 KB Created: 2021-03-25 11:48:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6dd50d06184ab275bc386fe23c8b9d91 SHA-1: 1ba177635bb5ca24ff467d75b2232c7387fc397b SHA-256: 3fbb99c243110451661fb81d86982896fa6405e9562b6c1a19f962f3198bfbbd
232 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is designed as an image-only lure, typical of phishing attacks, to entice users to click on embedded links. It contains multiple links, including one pointing to known malicious redirector infrastructure (https://yafferge.ru/aws?utm_term=konica+minolta+bizhub+c224e+toner+cartridges) and a link farm of other PDFs. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5491

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 58 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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/aws?utm_term=konica+minolta+bizhub+c224e+toner+cartridges
    • https://tatunonomufobuf.weebly.com/uploads/1/3/4/3/134355176/xorazubapuboxovu.pdf
    • https://kasipuxatupar.weebly.com/uploads/1/3/5/9/135966953/jozol.pdf
    • https://lomixefewagad.weebly.com/uploads/1/3/4/5/134592496/6123110.pdf
    • https://wunamixexot.weebly.com/uploads/1/3/4/4/134456109/eb624fc4e0e5.pdf
    • https://tojejalunegod.weebly.com/uploads/1/3/2/7/132710717/da34f.pdf
    • https://uploads.strikinglycdn.com/files/a7c0a3e7-01ad-4aab-b9b3-c25392de2028/68629738701.pdf
    • https://uploads.strikinglycdn.com/files/39817490-f8a0-450a-8368-56e98fc978da/can_a_jeep_grand_cherokee_pull_a_camper.pdf
    • https://s3.amazonaws.com/kotenu/153729979.pdf
    • https://s3.amazonaws.com/nunakixuma/best_hd_wallpapers_for_android_apk.pdf
    • http://sevixuvidivisaw.epizy.com/bumezakigaxefilurukil.pdf
    • https://s3.amazonaws.com/faluzotixupi/sides_edges_faces_and_vertices_worksheets.pdf
    • http://fakefidefunes.rf.gd/pre_calculus_grade_11_teacher_s_guide.pdf
    • http://lorasis.epizy.com/tropico_6_guide_tips.pdf
    • https://uploads.strikinglycdn.com/files/696fec9e-486b-437c-baa8-4e5499b81337/is_the_stock_market_on_a_bubble.pdf
    • https://s3.amazonaws.com/nemafu/xametoramamazarek.pdf
    • https://uploads.strikinglycdn.com/files/60fbb522-9e05-4655-99a1-3b7fa96ae5fe/what_spine_arrow_for_60_lb_bow.pdf
    • https://s3.amazonaws.com/niwotipugonuvoz/john_deere_d170_steering_gear_replacement.pdf
    • https://s3.amazonaws.com/rupatojuko/rarupilokus.pdf
    • https://s3.amazonaws.com/sinamozagemoger/resewoziwuvijexagof.pdf
    • https://s3.amazonaws.com/sazixipame/banjarmasin_viral_video.pdf
    • https://s3.amazonaws.com/vovuzize/84410106658.pdf
    • https://uploads.strikinglycdn.com/files/b198aa70-0813-4505-858d-850c18ac61a2/nirawidasuwidasadobox.pdf
    • http://forofadikov.rf.gd/automation_testing_books.pdf