Malicious PDF — malware analysis report

Static analysis result for SHA-256 53118ae1438aba27…

MALICIOUS

PDF

95.5 KB Created: 2021-05-23 04:05:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: af9d9f6b8d23c464cf56b1557d66998d SHA-1: 9460d0ad22b0136d138a854cfc02cf7907b60802 SHA-256: 53118ae1438aba27eb13a5f417f7d4cec87690631c4a9a2abf2ef4050d81d694
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://lozipotod.ru/strik?utm_term=transfert+thermique+cours+et+55+exercices+corrig%25C3%25A9s+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401732/normal_60493a121071f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491175/normal_6065c0a34d953.pdfIn PDF document text
    • https://sosedegif.weebly.com/uploads/1/3/2/8/132815053/315587.pdfIn PDF document text
    • https://pepodefaposuv.weebly.com/uploads/1/3/5/9/135992330/8186fe690a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479236/normal_600662e033e01.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381090/normal_5fd05f94ec279.pdfIn PDF document text
    • https://xufujakuzizam.weebly.com/uploads/1/3/5/3/135315974/mabekolirakuwove.pdfIn PDF document text
    • https://xaxarudo.weebly.com/uploads/1/3/0/7/130740130/rubamobonelu_kubuv_midolarupozidoz_newedaduxu.pdfIn PDF document text
    • https://zilisekisami.weebly.com/uploads/1/3/1/4/131437354/7274813.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459805/normal_600fd17ab3ad4.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/rezugekolaba/what_is_watershed_management_class_12.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/icici_pru_savings_fund_fact_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eae40ef0-f702-491f-94e2-69edd7961822/dbx_driverack_pa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/145db759-0f63-4fc5-a019-cc2eaf936f3c/how_to_get_a_free_psych_evaluation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04e9ea0b-aa20-48a3-bf41-5fcad75e6d87/jesse_livermore_how_to_trade_in_stocks_audiobook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/690d15c4-9072-4117-9a5b-5d871981f091/79368126424.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/how_to_gather_table_stats.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfa5c297-cd4b-45b5-89f5-4196ed1e5da7/what_do_bodybuilders_eat_to_bulk_up.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/jumobitazivazo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11730 5948 bytes
SHA-256: c95cd95518fcdcb93ac9dc902bb7fe75f1265cf8b8f6067d8421a31e9b0db79f
font_01_sfnt_off00012afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AFA 14148 bytes
SHA-256: 3b26ae6fbadfc17b67dc63e8b8d6d37b9811170556dc21470f1a97eddfcac7d5
font_02_sfnt_off000158a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158A2 16136 bytes
SHA-256: e9f154799f5721d194f7d6850e1f69f82a47b9f7788147e00219f53dedba5c7b

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