Malicious PDF — malware analysis report

Static analysis result for SHA-256 82b6447ce354a4a8…

MALICIOUS

PDF

76.0 KB Created: 2021-03-30 10:16:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: dd1404a824158963ecc37e3fb5e41672 SHA-1: eda5b6a9a711d4c73f5a2c41bcaec8cd9919b553 SHA-256: 82b6447ce354a4a81f976e9c83925ccf74d8b139f16512c8c60ba73ab5fc68e1
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the redirection to potentially malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://leonvi.ru/strik?utm_term=dewalt+drill+set+20v+brushless PDF link annotation
    • https://nonadokemiraf.weebly.com/uploads/1/3/0/9/130969568/3973959.pdfIn PDF document text
    • https://sabalijazot.weebly.com/uploads/1/3/2/6/132695986/pufidogu.pdfIn PDF document text
    • https://funogumoduwe.weebly.com/uploads/1/3/4/3/134309977/gegivolitigenox.pdfIn PDF document text
    • https://susemozud.weebly.com/uploads/1/3/2/8/132814624/28a52d6b6526cae.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/gurupixabogivaz/go_math_book_accelerated_grade_7_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/52607253623.pdfIn PDF document text
    • https://07d68bf2-0661-47e2-9ffe-eae068a071af.filesusr.com/ugd/fef806_c0a7621b73ca45ebac55a7f7970d13e4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/24b1cbaa-85c8-41b8-ae4e-03170d22d4d8/remington_11-87_premier_light_contour_review.pdfIn PDF document text
    • https://aee666f7-65d2-4416-8089-42e5bd85255d.filesusr.com/ugd/c4036c_2cda2d88a7c4492fb5757bbf8227a6be.pdf?index=trueIn PDF document text
    • https://4f6c49ad-35c2-4e1b-a50e-a4ca4816ee30.filesusr.com/ugd/a28dad_7f3c3e4201ac4fe1bca3c16d107e2028.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/katajumuvegokatuvoxusutev.pdfIn PDF document text
    • https://37e0f79d-b0c1-4727-b76d-5b759c81288f.filesusr.com/ugd/9c66ff_591f4aefe81f4bc897ee0a1b67925adc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/doraemon_new_movie_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c938492f-c884-450e-b6ec-620c0c6d5be4/83813947335.pdfIn PDF document text
    • https://a1d3e036-d9a1-4be1-9d2f-eedbb581cb22.filesusr.com/ugd/3ce946_af8dd89facb844f4a3ddeb88b92f365b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/somisilegex/carl_rogers_unconditional_positive_regard_quote.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/90544186562.pdfIn PDF document text
    • https://14535e1a-360a-4d01-a655-fa33e115c80e.filesusr.com/ugd/b222ea_32ae09ec4c5045f7842d74d84de41613.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/dell_ultrasharp_u2515h_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/96737957335.pdfIn PDF document text
    • https://8e12fe21-47c1-448c-af9e-883e7c84523b.filesusr.com/ugd/52ac5e_afa17b3128734d9285dd2083d50cb58c.pdf?index=trueIn PDF document text
    • https://229c3593-bb94-4e5d-9b9f-ca3747df48ef.filesusr.com/ugd/145364_6073a53242bc4c18be573f351ae0f629.pdf?index=trueIn PDF document text
    • https://bcbc83ff-a82b-4234-bf1d-c69e8cae54d5.filesusr.com/ugd/057c82_6c7fa926d40a4ba5aba571850586bf29.pdf?index=trueIn PDF document text
    • https://70fbc5f3-53e4-4072-9ff7-a5862d19847b.filesusr.com/ugd/bb3bf9_2832d21faf014ae69762b4e4f5040371.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/66b2dc85-222e-40e5-a746-6b472dffad0b/factorytalk_view_client_configuration.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_off0000eb73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB73 5476 bytes
SHA-256: 57dee226473c5bbcbd790dbd443decc3efbff75674a2a1bce53b919cae8d4296
font_01_sfnt_off0000fe22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE22 10708 bytes
SHA-256: 1035bc0d5d33578c1e146fdd758f5ecdb4d187becba3cd2614b1d154687e57ba