Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2870703dc780333…

MALICIOUS

PDF

87.0 KB Created: 2021-03-16 15:10:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 5d18aeabf8e7ecb31c42add335f5a598 SHA-1: 967a2e968e5abc46058d6fd6dcdc717e415252d0 SHA-256: b2870703dc7803334a2e9ca6a991be0079d398384f2d73b16f3c47feba02ab1b
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan distribution attempt. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document's apparent purpose is to lure victims through a deceptive template name.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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://kuzutuzo.ru/123?utm_term=education+portfolio+cover+page+template PDF link annotation
    • https://wojewifonutej.weebly.com/uploads/1/3/4/8/134883442/fosugageka-dijunigatefa-mizeruvomapaw-loxowujil.pdfIn PDF document text
    • https://xoxujodega.weebly.com/uploads/1/3/4/3/134363828/vamed_fuzusadofawun_patidorupesi.pdfIn PDF document text
    • https://jedagafigi.weebly.com/uploads/1/3/1/4/131438055/luneranuk_linisetawip_fotadotage_kelanexas.pdfIn PDF document text
    • https://jujipepovoduvu.weebly.com/uploads/1/3/4/0/134017188/kefosodukibula-suwuzipepole.pdfIn PDF document text
    • https://bolumuratojepo.weebly.com/uploads/1/3/4/7/134749128/pututewaw_sovigu_firomasugu_tebepufixefu.pdfIn PDF document text
    • https://xaporavuxeboj.weebly.com/uploads/1/3/2/6/132695407/19cfbc73e2af.pdfIn PDF document text
    • https://dekitinuro.weebly.com/uploads/1/3/4/8/134871397/8331875.pdfIn PDF document text
    • http://lenorimageb.iblogger.org/cdf_and_of_a_continuous_random_variable.pdfIn PDF document text
    • https://nolobatunu.weebly.com/uploads/1/3/0/7/130740420/wunerane.pdfIn PDF document text
    • http://nisaledax.iblogger.org/arduino_nano_3.0_pwm_pins.pdfIn PDF document text
    • http://vadudidubiv.iblogger.org/jedumuzexojiwug.pdfIn PDF document text
    • http://gotosutafizal.iblogger.org/vimezif.pdfIn PDF document text
    • https://tufanemoxidubux.weebly.com/uploads/1/3/4/3/134315727/8414910.pdfIn PDF document text
    • https://bulabameworiw.weebly.com/uploads/1/3/4/0/134096114/4285947.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jakukimokop.rf.gd/84008264894.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ea4b254-539f-4cbb-97ef-d150b6c382ca/sifugexujugege.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45ee1ef8-9469-43f1-baf4-9e2dbcd1790a/89869547283.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd339333-ee3c-4420-9fc5-0a3361b71051/lonumad.pdfIn PDF document text
    • http://bipimubisojup.rf.gd/98450655881.pdfIn PDF document text
    • http://xupikilagi.rf.gd/kugebotujin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54a0ecd4-93ef-41e2-bd6d-741ece5a8019/49429289144.pdfIn PDF document text
    • http://fobapisarut.epizy.com/65152155473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58983f9c-29fc-4783-8191-b6fd43350bb1/topdog_underdog_critical_analysis.pdfIn PDF document text
    • http://vexowiwoputam.rf.gd/cost_to_send_domestic_letter.pdfIn PDF document text
    • http://pofiwun.rf.gd/what_is_meant_by_the_great_apostasy.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_off000113d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D8 5316 bytes
SHA-256: 7236f0fd43728ec0e2e5081ddf0ed357d5c94c4666ee21ba0ad2025f447df4b9
font_01_sfnt_off000125e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125E8 11768 bytes
SHA-256: 1769ed2a8e6a2c3ad9a941a9f99bcfe5463ff8fb00900818200fc3bbdbb9614c