Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdbff75a927ff784…

MALICIOUS

PDF

78.6 KB Created: 2021-03-26 08:20:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 7f609e6e784f1b837302db439e83d44a SHA-1: 8d3feda3b6e1360a455e540beb595116547dc169 SHA-256: fdbff75a927ff784623292902840108d433b1290cd00d79fd21d67e7a0079f14
126 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain associated with link farming and potential phishing or malware distribution. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and URL analysis suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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://pelibifir.ru/strik?utm_term=dias+festivos+por+ley+2020+ley+federal+del+trabajo PDF link annotation
    • https://cdn.sqhk.co/bepeguvovori/jhTx3J5/49277157985.pdfIn PDF document text
    • https://cdn.sqhk.co/dexijonur/agjhbhc/alienware_monitor_aw2518hf_specs.pdfIn PDF document text
    • http://mofobawosenej.mygamesonline.org/nufibaruneb.pdfIn PDF document text
    • http://nakotigolajeg.scienceontheweb.net/beruzaforigu.pdfIn PDF document text
    • https://cdn.sqhk.co/gumorefose/jaZayjd/fuwumanulimosozikigudev.pdfIn PDF document text
    • https://cdn.sqhk.co/perikowep/gcjfjcP/crowd_running_away_sound_effect.pdfIn PDF document text
    • http://tonevagewalilu.medianewsonline.com/29140501908.pdfIn PDF document text
    • http://shoes-storie.club/91727923241uzbc4.pdfIn PDF document text
    • https://cdn.sqhk.co/nukusigemug/hdIhgLf/weekend_package_deals_to_amsterdam.pdfIn PDF document text
    • http://idealicaitalia-official.site/pugipitunetazevizojovlccan.pdfIn PDF document text
    • http://mibejar.sportsontheweb.net/79xx_voltage_regulator.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d033114-e87a-4721-b187-6b24ecafc996/62487739919.pdfIn PDF document text
    • http://voresabuso.rf.gd/ansible_file_to_localhost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b88f2ee-51e4-4f3e-8f77-2cfa435466b4/congressional_plan_during_reconstruction.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4177fbdc-c80b-410a-be88-4409ee246e29/25657191378.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93e025cb-9e7a-4f2c-8d00-1aff28f89f7d/why_is_my_us_ds_light_blinking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19f11a5a-a2a5-49df-8539-b45fa1e47f4c/drawing_human_anatomy_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/48402264334.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/40299453790.pdfIn PDF document text
    • http://kotumeberi.rf.gd/jukaxumegesife.pdfIn PDF document text
    • http://vifidumefitur.atwebpages.com/job_application_letter_format_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/nexus_1000v_ovf_download.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/lajemaladilomepakoti.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_off0000f078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF078 5684 bytes
SHA-256: b30dfdb0502bf02ad0ac3c319fee1e4785c3a4cab687d201ae9bfa01d8537051
font_01_sfnt_off000103fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103FA 11856 bytes
SHA-256: 0efba8894ce29337352f8b258b180c700e25fea93e16be93d51888df13c1ee50

Open this report in the interactive analyzer, or submit your own file for analysis.