Malicious PDF — malware analysis report

Static analysis result for SHA-256 e50d29b7f6d4998e…

MALICIOUS

PDF

70.9 KB Created: 2021-02-18 23:46:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 9a274815cb29e6d8615f3c527081be58 SHA-1: 88922e3e414aef1a1ab541400e66d0042efb78c6 SHA-256: e50d29b7f6d4998ed36adcfaadc91857538429b7cf22372eadd4fcbedb48d195
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating it likely serves a malicious purpose. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The embedded URLs and the document's structure strongly indicate an attempt to redirect users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/strik?utm_term=why+lenovo+laptop+plugged+in+not+charging PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366357/normal_5ffcb848dbc7e.pdfIn PDF document text
    • https://cdn.sqhk.co/nejisakatok/hhfhfhf/sample_swot_analysis_of_a_business_plan.pdfIn PDF document text
    • https://cdn.sqhk.co/kifavubivelo/hbAJ0Ie/real_steel_movie_free_download_480p.pdfIn PDF document text
    • http://ctyr.ru/71518759594zg0mb.pdfIn PDF document text
    • https://foxaxefaga.weebly.com/uploads/1/3/1/3/131398491/judoda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407062/normal_5ff4c50c162f7.pdfIn PDF document text
    • https://fumasidabufip.weebly.com/uploads/1/3/0/7/130775820/muxawuxonebufekeworu.pdfIn PDF document text
    • http://reduslimitaly-ufficiale.site/23751877856dl8m4.pdfIn PDF document text
    • https://cdn.sqhk.co/janezewufaj/AhffhaA/minecraft_m_ores_mod_1._12_2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408170/normal_6027bf55155c1.pdfIn PDF document text
    • http://amst-watch-v1.club/reliability_analysis_in_research99pdv.pdfIn PDF document text
    • https://fekebejoluxoji.weebly.com/uploads/1/3/4/3/134309121/9086ee0f0c8e0c4.pdfIn PDF document text
    • http://tryici.xyz/resistance_3_trophies_guidefr7hf.pdfIn PDF document text
    • https://detaxenenikub.weebly.com/uploads/1/3/0/7/130776267/jevij.pdfIn PDF document text
    • https://lubefapezixa.weebly.com/uploads/1/3/1/3/131398117/kobekajotuw.pdfIn PDF document text
    • https://cdn.sqhk.co/jowapezo/gfoiegd/lefegususifo.pdfIn PDF document text
    • https://givolejemaxo.weebly.com/uploads/1/3/5/3/135345859/4651655.pdfIn PDF document text
    • https://javekekowunafot.weebly.com/uploads/1/3/5/3/135324960/risidumi.pdfIn PDF document text
    • https://cdn.sqhk.co/gibuzini/PhgayYW/ashampoo_droid_optimizer_review.pdfIn PDF document text
    • https://cdn.sqhk.co/rilowikapaz/OxfLhif/22235024909.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cffb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFFB 5332 bytes
SHA-256: 4e8b40e232682d57825652f5aff9107d4cf953cd887db6e8e03e816f1663fbf8
font_01_sfnt_off0000e22e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22E 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_02_sfnt_off0000ed91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED91 9356 bytes
SHA-256: 576a4314080932bf490145612f3ef4ff28238414d7187f58b95ff8949f11ca69