Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec038985aaa97366…

MALICIOUS

PDF

73.3 KB Created: 2021-01-24 11:45:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 49796e2acaf45aa6d3989c1ae90c376d SHA-1: 7aa7cde6606fc2dd93be5ac802b1bf1be79de928 SHA-256: ec038985aaa97366d48715a720f582002bf31dd6f53968671536af4dbdc53bd5
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV, with the specific detection name Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0. It contains an embedded URI pointing to a URL that appears to be a lure for employment opportunities, suggesting a phishing attack. No scripts were extracted, but the presence of embedded URIs and the phishing lure indicates a likely attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/123?utm_term=west+morris+central+high+school+employment PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4389604/normal_5fec97afb15bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422134/normal_5fe4865f3340d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496818/normal_600cf5c770aa5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378620/normal_6009ff7e22ddd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482402/normal_5fd80bffa75a3.pdfIn PDF document text
    • http://betmoy54.com/kill_shot_virus_zombie_fps_shooting_game_apkh35op.pdfIn PDF document text
    • http://lotto-investclub.com/stiletto_nails_short_pinklu5pk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409621/normal_5feb261ab7d89.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370987/normal_600892c2bdc8e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415742/normal_5ff54a8ef4087.pdfIn PDF document text
    • http://taher-tcac.com/homescapes_cheats_level_1938o92bu.pdfIn PDF document text
    • http://maximizator.xyz/77916811755bgwpb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385415/normal_5ff0b0b88e995.pdfIn PDF document text
    • http://ogranifruit.space/happy_tree_friends_lumpywqeze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bumilamufitilu.epizy.com/vukobevaginipirupizavika.pdfIn PDF document text
    • http://givonomiruf.rf.gd/common_sense_book.pdfIn PDF document text
    • http://tidomag.epizy.com/17775749505.pdfIn PDF document text
    • http://zoxokukazo.epizy.com/sintesis_de_lipidos_en_la_celula.pdfIn PDF document text
    • http://dufogatate.epizy.com/duwesuzas.pdfIn PDF document text
    • http://dixuzudes.epizy.com/guided_reading_level_dra_level_correlation_chart.pdfIn PDF document text
    • http://xubibufopude.epizy.com/19786264310.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_off0000d90e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD90E 5464 bytes
SHA-256: 6f31a5cb9b2d793709a5a4f90349b9f84fde4e604765394a07c5d8e358f0565b
font_01_sfnt_off0000eb8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8C 13856 bytes
SHA-256: 0a99615389a5a9051bac5a06c6cc6005a90f3fddface33f94130ebe214ac72ec

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