Malicious PDF — malware analysis report

Static analysis result for SHA-256 737d6f6aab46ef70…

MALICIOUS

PDF

84.5 KB Created: 2021-03-29 21:47:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 063572ec35a7e8a0c02dcfcb4bc49dc3 SHA-1: cc0b12b6bd8bfe9eddc44eefa509dd4b12ddc6ad SHA-256: 737d6f6aab46ef7035ea9fa76c81c44ad28930140b4c6c9d9743735db621f67b
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, including one pointing to a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://leonvi.ru/award?keyword=aveuglement+spirituel+pdf PDF link annotation
    • http://crawlmqyu.space/campbell_biology_10th_edition_dog1m5c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477913/normal_5ff75a1732f1b.pdfIn PDF document text
    • https://cdn.sqhk.co/xenojepezere/hgLgiii/dynamixel_xm430_emanuel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452389/normal_5fc65de8ddb05.pdfIn PDF document text
    • http://zuvinesewuwiz.iblogger.org/buledevowoluvudupakiziza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476947/normal_603c279c9deb2.pdfIn PDF document text
    • https://cdn.sqhk.co/woleparos/47hjgir/73219107063.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422144/normal_5fedf6bb440c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422385/normal_603944718df17.pdfIn PDF document text
    • http://microbestdigitalmeter.xyz/wepenonevufawaxifanaxe3dalu.pdfIn PDF document text
    • http://tikutajufa.22web.org/hormones_and_endocrine_system_worksheet_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/gEfvlP0/fusuletoxiwol.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/4a62ceda-c8af-40ae-96cd-99ae0649a7b7/33401059836.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cd7fde6-dbf5-4843-9f29-2ea37f4f5f61/zizisarulopumudupodok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4218d3a9-2468-4beb-b9f2-ddae4a548ad6/1995_jeep_wrangler_parts_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b96fc73c-c9a9-4cb9-9b99-778bc8804c74/zoliseligisorazara.pdfIn PDF document text
    • http://keximidurowu.rf.gd/spotify_free_for_pc_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/dancing_in_the_moonlight_violin_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/baden_baden_spa_guide.pdfIn PDF document text
    • http://rawobebisef.epizy.com/zesajumedabepalof.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/twilight_saga_eclipse_full_movie_download_1080p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42a725a2-0206-435d-995d-a60e44526e30/wefalofi.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/data_security_policy_template_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/company_of_heroes_2_ardennes_assault_patch_download.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_off000109f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F9 5200 bytes
SHA-256: e0d7ea4e77049a6b6826e2a3b065255246df6dd989320b999f2a55c1c9743754
font_01_sfnt_off00011ba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA7 12408 bytes
SHA-256: 292cc835e917e4eb80b617df43c9e1fed4374f7e1d236437c205153dcd58baba