Malicious PDF — malware analysis report

Static analysis result for SHA-256 ead148bad143e877…

MALICIOUS

PDF

71.6 KB Created: 2021-04-04 12:04:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 36054612ee0c1cc64d674ccfe180d5c0 SHA-1: a5bcddfeeafa0b341aaeb90cb3ef3a30f997eee5 SHA-256: ead148bad143e877255ac4cb2fec8ef83d5ae53194ea724988a2558240714e7a
206 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body is heavily obfuscated, but the presence of embedded URLs and the heuristic firings indicate an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://soxebez.ru/wix?keyword=rzr+170+manual PDF link annotation
    • https://pilopagitek.weebly.com/uploads/1/3/4/8/134856928/dibarofaz.pdfIn PDF document text
    • http://toolsbestpricemicrometer.site/zombie_derby_pixel_survival_hackuhmbu.pdfIn PDF document text
    • https://nogisapu.weebly.com/uploads/1/3/1/4/131453993/0db3d1d65.pdfIn PDF document text
    • http://vienvozvrat.site/what_is_the_importance_of_financial_modelsgpip8.pdfIn PDF document text
    • http://kreativoblako.com/25621278463kdatn.pdfIn PDF document text
    • http://reawont.online/adobe_2020_release_datebu0fn.pdfIn PDF document text
    • http://5dradio.ru/how_to_pair_lg_bluetooth_headset_with_iphonejppwl.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/24023ed7-ff9f-4957-9286-bc022be87db1/7730747016.pdfIn PDF document text
    • http://zinebozozapi.rf.gd/what_motherboard_is_in_a_dell_optiplex_780.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb1262ff-5c29-432a-962b-48ae3eefe9b6/samsung_galaxy_a10e_phone_review.pdfIn PDF document text
    • https://f238abdf-92e3-4651-90df-65b6e8a648d9.filesusr.com/ugd/99965f_9053ebf6ba624edf8ed125dff4e05a26.pdf?index=trueIn PDF document text
    • http://tumemali.rf.gd/prostate_cancer_and_smoking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7fb140e-321f-4514-8f95-bac0fd21fe9a/tubezebowisugilolofirox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fe58b6c-f1ce-4ea5-be6f-a1a4e8791976/can_spells_crit_in_tft.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a458c4b-b741-4fc7-af2d-4d171754fa9e/zovobosefisabavuseb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad0516de-6587-4357-b0ff-fdb4c7497d82/critical_thinking_in_nursing_defined.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b26d146-1806-4ba0-b065-0dcabb6d130f/linear_algebra_a_modern_introduction_3rd_edition_solutions_manual.pdfIn PDF document text
    • https://02274cc9-8b57-4441-be19-e46c089ec46b.filesusr.com/ugd/f11b8f_ef1eba682aa8433d83b158c860d9180a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/96c6b4a4-900b-4dd6-b9ca-ea3b16ca9ded/3094996076.pdfIn PDF document text
    • https://1618b3f4-dcc0-4047-a816-eeb1cbe43c51.filesusr.com/ugd/a01749_ada871d7c8904ab4ab971e4b8b8726d5.pdf?index=trueIn PDF document text
    • https://2ea9429b-0332-4ee6-bb75-ab9535b56c99.filesusr.com/ugd/e2f7e1_24782b0d722b4bd9b559381a4b6e3ab3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1efa5cc9-dcb1-408b-840c-df38fa487e8c/descargar_la_biblia_reina_valera_1960_en_audio_gratis.pdfIn PDF document text
    • http://jagokulu.epizy.com/wejusujez.pdfIn PDF document text
    • http://nosaras.rf.gd/cisco_anyconnect_vpn_client_windows_xp.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_off0000da86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA86 4984 bytes
SHA-256: a2ec2edbc799148b8246021a16006e445281432650a31032b092f13b4ad393dc
font_01_sfnt_off0000eb71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB71 11080 bytes
SHA-256: df0730fc9d3766b9ddad8a58213dc11975ddf7789266c15e7ea1a9ceb731116a