Malicious PDF — malware analysis report

Static analysis result for SHA-256 65f569bb631f6d7a…

MALICIOUS

PDF

80.9 KB Created: 2021-03-05 16:46:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c7b871409417a9d2cd235c48e5b8ce1 SHA-1: ed9112ce0e0a075e0273354a689a315027f2084e SHA-256: 65f569bb631f6d7a7b2f837e954c840c8907943da488e1c5c74c6a916811ccc8
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one prominent URL pointing to 'midufefew.ru', suggesting a phishing or malicious content delivery attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, likely for SEO manipulation or to distribute further payloads. ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • 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://midufefew.ru/aws?utm_term=night+owl+dvr+ddns+configuration
    • http://roskycnmx.com/zarchiver_donate_apk_latest_versiongzjdn.pdf
    • http://redit.fun/crock-pot_smart-pot_4-quart_digital_slow_cooker_white_sccpvp400vh2j5.pdf
    • http://rostov-mobile-doctor.ru/16341451299f3sji.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/zagubip/informant_meaning_in_urdu.pdf
    • https://s3.amazonaws.com/rudelazifizuvo/48378340839.pdf
    • https://s3.amazonaws.com/lowebemuwojiso/wurenarusarirememukikes.pdf
    • https://s3.amazonaws.com/nokiva/canzoniere_per_bambini_chitarra.pdf
    • http://jelenexej.rf.gd/b36tc_bonanza_turboprop_performance_specs.pdf
    • https://s3.amazonaws.com/daselex/6011169835.pdf
    • http://subuvitoruxev.rf.gd/pdf_to_word_converter_for_macbook_pro.pdf
    • http://runugerobel.rf.gd/13941362923.pdf
    • https://s3.amazonaws.com/viromibukoleliw/bombay_dyeing_cotton_bed_sheet_amazon.pdf
    • http://koxowasone.epizy.com/mibonodez.pdf
    • http://zolivowubek.epizy.com/xuwebapikux.pdf
    • http://japefafe.epizy.com/filegeretoxuwi.pdf
    • https://s3.amazonaws.com/dogazisuze/apex_legends_macbook.pdf
    • https://627ea4a7-3f28-4bf3-8c99-6a9da7dacf48.filesusr.com/ugd/1970e2_87321e0e91514f01b97b27029d0a45df.pdf?index=true
    • https://f6ce3cfb-f922-470c-9e0e-eaf724001b0e.filesusr.com/ugd/defcb2_6d186e5e0b0b40adb78bbf0e9d738011.pdf?index=true
    • https://s3.amazonaws.com/rerinago/25276193628.pdf
    • https://329f26c8-0235-4118-8622-173d264d9cf1.filesusr.com/ugd/221f3a_47c5e557ccde469db9d1e95a6d185dd9.pdf?index=true
    • http://xafaxeko.epizy.com/airtel_hd_video.pdf
    • https://s3.amazonaws.com/xazarujokemus/hotel_del_luna_ost_part_1.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f30e.bin
56aa95f681c89549d7d75924e986cf9a0e7aa4f74880820d9f2262a0e0caf1e2
pdf-font-stream PDF embedded font (sfnt) at offset 0xF30E 5168 bytes
font_01_sfnt_off000104b3.bin
2e5e31ba3b031edfa17da4cec0c0fe070a6ac411bccb9a151d7fb378fd1f90a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x104B3 10316 bytes
font_02_sfnt_off00012822.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x12822 4324 bytes