Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e22a754f3487d30…

MALICIOUS

PDF

82.3 KB Created: 2021-05-03 06:00:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 06419bafb626e7dfcb3eafc3ba6c6659 SHA-1: 1087aadd4be243971a31e41cb1a8da48350d8f30 SHA-256: 7e22a754f3487d30ec03ed94121bc94977921e58804145f507417326503ec916
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a phishing or redirection attempt. It contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'toddler bedtime stories online' and application metadata, suggesting a lure to disguise the malicious links. No scripts were extracted, but the presence of malicious links is sufficient evidence of a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=toddler+bedtime+stories+online In PDF document text
    • http://mimedilubaj.22web.org/modusazemet.pdfIn PDF document text
    • https://nufapapezo.weebly.com/uploads/1/3/0/9/130969462/8701543.pdfIn PDF document text
    • http://believes.space/dusikirevexaaosuh.pdfIn PDF document text
    • https://gekubele.weebly.com/uploads/1/3/2/6/132683169/bc4d3cef.pdfIn PDF document text
    • http://all-system7.work/andrew_ng_machine_learning_python_reddit6gyib.pdfIn PDF document text
    • https://bakigimos.weebly.com/uploads/1/3/4/3/134322269/koseponunare.pdfIn PDF document text
    • http://hurricane1.space/rheem_tankless_hot_water_heater_servicezasml.pdfIn PDF document text
    • https://wewejodoje.weebly.com/uploads/1/3/4/6/134685686/retarukap_nerawubonesigo_mosobasiziroti_mozul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zosujudete.epizy.com/sizibuba.pdfIn PDF document text
    • http://xixitaxizowana.epizy.com/2414882712.pdfIn PDF document text
    • http://dumudolaba.epizy.com/kamekiwajiperisag.pdfIn PDF document text
    • http://rupenulewelew.rf.gd/70289686205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06b47d9c-5168-4cf3-b6df-ac8c6fd86bac/reliance_606_water_heater_thermocouple_part_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d088472-de93-4806-a5a0-ce9f02dfdad9/wheel_of_time_show_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9072bb03-72e7-42ec-9a05-7417105c37c3/taxixomov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6982eb9f-e659-4eaf-9d0e-ee64e10936ae/how_do_i_activate_my_lg_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25d2827a-87c0-477d-8a51-7b23c27e1d75/dominos_pan_cheese_pizza_nutrition.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_off000109b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B6 4852 bytes
SHA-256: bd2eb4ccbb952e6d7eb89dad05f300a1514cc0b6676ef6d3c28e4d202282f165
font_01_sfnt_off00011a19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A19 9972 bytes
SHA-256: be7fa5055d24085aa63f4a95821cbbf7ce56a6bcbba8678fba853426fa392f35

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