Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0abadbe51aca193…

MALICIOUS

PDF

84.9 KB Created: 2021-03-09 10:07:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 73888e93f16e98f61c987837ea1b6c5b SHA-1: 7d857f3f93e33cc28305b628b2b577cff1562361 SHA-256: f0abadbe51aca193b3fc091eca9f9aa75c2209458b871b43e6032752008dc3bd
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing and SEO link farm abuse. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, with one pointing to 'rimuzomidaz.weebly.com'. The presence of embedded URLs and the ML classifier's high confidence score further support malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm behavior suggest it's designed to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://vilenefex.ru/aws?utm_term=living+religions+8th+edition PDF link annotation
    • https://rimuzomidaz.weebly.com/uploads/1/3/4/3/134353295/dewezagufaxajeguweje.pdfIn PDF document text
    • http://samettemiz.xyz/free_maths_homework_sheets_year_3mdffo.pdfIn PDF document text
    • http://5coupons.info/how_to_light_magic_chef_rv_stoveu0frb.pdfIn PDF document text
    • https://bimexojagof.weebly.com/uploads/1/3/4/6/134655387/muxexazizubiberusez.pdfIn PDF document text
    • https://vokarojunez.weebly.com/uploads/1/3/2/6/132696330/dopoz-pavubowe-lusazizeturuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480886/normal_6014c04156379.pdfIn PDF document text
    • https://rasuzumiketasak.weebly.com/uploads/1/3/4/3/134393825/b613db5425fdce7.pdfIn PDF document text
    • http://drovazvenigorod.ru/dokurubijevetabixivu1fiqo.pdfIn PDF document text
    • http://fabermanufacture.ru/amazon_prime_now_whole_foods4zjwe.pdfIn PDF document text
    • http://tortomsk.ru/attune_knee_surgical_techniquew4dh2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454809/normal_603b6aca7b3da.pdfIn PDF document text
    • http://vitalia-transports.com/online_registration_form_template_php_freeungyo.pdfIn PDF document text
    • http://apparentlyopt.com/summer_waves_pool_frame_partsetzbg.pdfIn PDF document text
    • https://zofudugopevemob.weebly.com/uploads/1/3/1/6/131607066/rofaluxemoge.pdfIn PDF document text
    • http://zerkalo-fugicar.website/letra_y_acordes_haz_llover_renovadosqevp8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414172/normal_5ff041e10abec.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/wubaxajudanudukopabenap.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/android_framelayout_addview_position.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/29690828016.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/zafivonewaj.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/35171207562.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/wefufini.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/sailor_moon_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/merowuxeseserix.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off0000fc83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC83 6744 bytes
SHA-256: b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808
font_01_sfnt_off00010d68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D68 5072 bytes
SHA-256: 31be251cdbeb672c6c66a98e0df9f61fbafe5c06ab2a928171e07ad1b686a4b8
font_02_sfnt_off00011eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB2 11100 bytes
SHA-256: a4927406bd809a812bef7b4b7a3b5cf415b466e0c0874cb35463232e9cac961d

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