Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f930681fe973873…

MALICIOUS

PDF

81.4 KB Created: 2021-05-12 03:40:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: c6a672f769b657db2dc3570ec469e10e SHA-1: 1bf810145c3daaacf5ac61f241d2513094c605b3 SHA-256: 2f930681fe97387387a7b6bade32414d56f6df19ad0c16232a4b17c9bd281894
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains multiple embedded URLs, with 'https://resalured.ru/strik?utm_term=crock+pot+slow+cooker+settings+i+and+ii' and 'http://blablablacar.online/how_to_analyse_structure_of_a_textbev9v.pdf' being particularly suspicious due to their domains and the heuristic flagging it as a link farm on disposable hosting. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://resalured.ru/strik?utm_term=crock+pot+slow+cooker+settings+i+and+ii PDF link annotation
    • http://blablablacar.online/how_to_analyse_structure_of_a_textbev9v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407576/normal_5fd946f357c6d.pdfIn PDF document text
    • https://cdn.sqhk.co/pamavunawi/xajieCl/48449520520.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424662/normal_6052c3cededb0.pdfIn PDF document text
    • http://llloooodddd.space/garmin_gpsmap_64st_best_buy3qovv.pdfIn PDF document text
    • https://sozizupisez.weebly.com/uploads/1/3/1/8/131872239/lepevose.pdfIn PDF document text
    • https://cdn.sqhk.co/subesanodag/iaWJggj/photoshop_freeware_download_for_windows_7.pdfIn PDF document text
    • http://it50disconto.info/indian_stock_market_downloadcxd8l.pdfIn PDF document text
    • http://genoray.pro/filiragepolimesuvupeoav56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389606/normal_60421bf6b2d82.pdfIn PDF document text
    • https://cdn.sqhk.co/zodozane/4jbjggp/34300853825.pdfIn PDF document text
    • https://kiwugefifowi.weebly.com/uploads/1/3/4/8/134878570/1661868.pdfIn PDF document text
    • https://volinamonapefez.weebly.com/uploads/1/3/4/4/134494747/e493fd7e57.pdfIn PDF document text
    • http://toppiksnack.xyz/98404269987heyv9.pdfIn PDF document text
    • http://runexedagig.iblogger.org/bibliocraft_mod_1._12._2.pdfIn PDF document text
    • http://zinobinipote.22web.org/jopajojabinotusofok.pdfIn PDF document text
    • https://fejuratomejavud.weebly.com/uploads/1/3/0/7/130776174/410215.pdfIn PDF document text
    • https://zupevinar.weebly.com/uploads/1/3/0/7/130739631/vururawebejug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/f445da97-5241-4367-990b-53111f457ce4/27832089977.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2542c9c9-0ee4-4817-b46b-fcc8fe6815e3/inductrix_fpv_pro_battery.pdfIn PDF document text
    • http://wudobepazu.rf.gd/statistical_methods_for_agricultural_research.pdfIn PDF document text
    • http://pizidera.rf.gd/5686182232.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e8735c5-0e10-44bd-89fe-40b44d5a8a0e/initialize_array_structured_text.pdfIn PDF document text
    • http://mukokulag.epizy.com/33182202935.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/543be796-d92f-41d6-adbb-82c4f78d818e/notufuzanabofi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f22b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22B 5208 bytes
SHA-256: b436b61a0fe99e026f3caac9cfb5d6dd929ecc55ec6b5e5f49ce2b7d315dede8
font_01_sfnt_off000103fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103FE 11028 bytes
SHA-256: 243d29c2b0af69eca74645fb1d4c80686b57ef99599b895f3127c84c530754a2
font_02_sfnt_off00012950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12950 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e