Malicious PDF — malware analysis report

Static analysis result for SHA-256 50d101d2720b5990…

MALICIOUS

PDF

80.9 KB Created: 2021-01-05 07:14:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 88d3699a1127aa4968d7e8528755ca84 SHA-1: 9529abe21d1f18d0258fdceae1cae5e72bc56454 SHA-256: 50d101d2720b5990fdf5637a272349b866eaba5be9d3f97aea3cf0cdc0dd2fda
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF document flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. The 'SE_PAYMENT_REDIRECT_LURE' heuristic indicates the document's content is designed to trick users into believing there are new or changed bank instructions. The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF link farm' pointing to multiple PDF files hosted on weebly.com, suggesting a coordinated effort to distribute malicious content or phishing pages. The presence of embedded URLs further supports the attack pattern of redirecting users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://trafficel.ru/aws?utm_term=application+format+for+applying+noc+for+passport PDF link annotation
    • https://tefizaset.weebly.com/uploads/1/3/4/5/134587169/1977ad30c3f77.pdfIn PDF document text
    • https://sofubile.weebly.com/uploads/1/3/4/3/134380394/rerikexumew.pdfIn PDF document text
    • https://sudirunerobup.weebly.com/uploads/1/3/4/8/134877260/1863264.pdfIn PDF document text
    • https://dimomivij.weebly.com/uploads/1/3/4/5/134504604/gilefoju_lorekirabavi_vijuzizirix_limukuliz.pdfIn PDF document text
    • https://babaperivagam.weebly.com/uploads/1/3/1/3/131379833/tewajanatakizudumozu.pdfIn PDF document text
    • https://ligofaxudatejot.weebly.com/uploads/1/3/0/7/130739538/573ee.pdfIn PDF document text
    • https://vesumuzuvof.weebly.com/uploads/1/3/4/6/134685641/63b04f.pdfIn PDF document text
    • https://kobuzefejara.weebly.com/uploads/1/3/1/4/131437799/mulenenedo_vetum.pdfIn PDF document text
    • https://vogoworelo.weebly.com/uploads/1/3/4/2/134266182/tupozatufebemud.pdfIn PDF document text
    • https://vazanopika.weebly.com/uploads/1/3/4/8/134896022/dunarezeluj.pdfIn PDF document text
    • https://towotadop.weebly.com/uploads/1/3/2/6/132682697/7468027.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/sesijesule/adobe_acrobat_reader_win_10.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/alcatel_lucent_manual_4019.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/bulletproof_diet_smoothies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6dd2ee5-5494-4571-8c67-30813d79336d/54512620280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/111e16e7-b959-46e7-b0b3-2e8b416e7fc8/pilugakukadasevefaxi.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/android_arrayadapter_in_fragment.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/urdu_poetry_books_free.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_off0000fd59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD59 5428 bytes
SHA-256: eba7039c5be31c20e8b4b39a41228dbd91628b7a0132e4b5c91ead1051407080
font_01_sfnt_off00010fce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FCE 11344 bytes
SHA-256: 2f9b14e5c521775ff2e8bb79679368e25e2e5c29a89aa2742fad9df2ea597b2e

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