Malicious PDF — malware analysis report

Static analysis result for SHA-256 673a2b3d0f5e7270…

MALICIOUS

PDF

86.3 KB Created: 2021-03-15 19:45:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 006ff4a44144ce4c7575b3b7811ab410 SHA-1: 3a3d1d45b73838dded177f0454e8ba072693e829 SHA-256: 673a2b3d0f5e72709a2f0adfbfe5bd012e084b5d5c4771188fa6b4702fd9cc50
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into visiting a phishing or malware distribution site. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URL suggest a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://fokemale.ru/wb?keyword=bosch%20ra1181%20router%20lift PDF link annotation
    • http://wusejopajaxus.22web.org/82492156730.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459177/normal_5fdc107c28ddf.pdfIn PDF document text
    • http://mebelintera.ru/252376282689mby0.pdfIn PDF document text
    • http://drive4mclaneaustell.com/lawixuloziwevodiwxyyia.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490116/normal_5fcdc623d364b.pdfIn PDF document text
    • http://afracheat3.xyz/harmonica_sheet_music_for_piano_manivfdm.pdfIn PDF document text
    • http://daating19.site/number_json_formatkor67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460076/normal_6029b76be28c7.pdfIn PDF document text
    • http://nofixeb.iblogger.org/92693292042.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404290/normal_5fe8994494ebd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/68e57ab4-9959-4741-bc49-0de99bf8a586/my_pet_dog_essay_5_lines.pdfIn PDF document text
    • http://giduzorim.epizy.com/29551345180.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f83d4e2-f636-42f9-8653-ad5f9419c838/2012_evinrude_etec_90_service_manual.pdfIn PDF document text
    • http://givotirufo.rf.gd/how_to_reset_panasonic_viera_tv_remote_control.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fab36a2d-1012-4220-91bc-c15bd382ec36/63971990166.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/858a5386-dc40-4a46-8b76-899bd50d3088/8188222476.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ee68736-874e-478e-9b7e-a3c654587c34/what_happens_in_the_last_book_of_the_after_series.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdfdd294-3019-4c3c-b1aa-72e8a8a6af25/what_topics_are_included_in_algebra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7ef66c4-2072-46ff-8733-ebf4a8d959aa/46394855679.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a13caf65-ba77-42ca-905f-3433feeaa8d2/the_great_divorce_summary_chapter_9.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c099760-d0da-40b7-8feb-45626d076422/2007_maserati_quattroporte_sport_gt_top_speed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a52a9288-58ae-48fc-84bd-562dac2ed8b7/32250828736.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b37aa996-6d19-4b30-a6e7-54dda9676ec0/88133704800.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48246bc2-8300-45d7-867c-fa31c252ef79/zamawotakelumatajanizijo.pdfIn PDF document text
    • http://sujomux.rf.gd/85097506683.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_off000112ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112ED 5264 bytes
SHA-256: 240ad1ccb2f5ce79e7afe6d93e2df64d7e0939d970276ec5e9715877f5c196e9
font_01_sfnt_off000124d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124D4 11040 bytes
SHA-256: 6c644fb6d09ab9b908ba7449cbd4ce5ceaf4370b3965e8bb093a3af57f32f2ce