Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ba55d9b145f54ca…

MALICIOUS

PDF

76.8 KB Created: 2021-04-07 15:29:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: de0ab9252010fafc4acc9df7b92a9e75 SHA-1: a53f44556c92f13b0c7c9a53e681a6c123f3a473 SHA-256: 3ba55d9b145f54ca32bcd1dd229b0a5c45e187221806888cbeaa6fa4a5849244
134 Risk Score

Malware Insights

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

The PDF contains an external URI pointing to a suspicious domain, and heuristic analysis indicates it's a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were extracted, the presence of external links and the overall detection profile point to a malicious document designed to trick users into visiting a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://xajibur.ru/strik?utm_term=samsung+rf263beaesr+ice+maker+parts PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388824/normal_6034dcd922a7a.pdfIn PDF document text
    • http://tuxoseve.22web.org/pijon.pdfIn PDF document text
    • http://lazokiwumemo.mygamesonline.org/25628317986.pdfIn PDF document text
    • http://gekigowegijuvo.22web.org/verizon_fios_jersey_city_channel_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446283/normal_5fd72e41d5d27.pdfIn PDF document text
    • http://mujabelor.mywebcommunity.org/75342740518.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470552/normal_5fdd7ff392f0e.pdfIn PDF document text
    • http://wolifote.getenjoyment.net/on_the_road_again_canned_heat_chords.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375077/normal_603c2a4c695f7.pdfIn PDF document text
    • http://xemizawufogutuf.scienceontheweb.net/kalubigizewodawodas.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/guxosa/wallpaper_2019_ke.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/uttarakhand_police_bharti_2019_application_form.pdfIn PDF document text
    • http://jubovetakuje.epizy.com/kozarikekareki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a373447-f99f-4b55-97ee-39d6da473d68/top_20_2020.pdfIn PDF document text
    • http://gajefeni.rf.gd/nitofef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25e0599b-8656-408f-a420-9180e4df4396/macbeth_act_2_scene_3_modern_english.pdfIn PDF document text
    • http://wodasakuzetu.rf.gd/root_explorer_android_2._3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0af5dc6-ebb7-4907-a03b-2e148156a7f2/how_to_train_your_dragon_3_cast_voices.pdfIn PDF document text
    • http://lojibovel.myartsonline.com/el_catecismo.pdfIn PDF document text
    • http://wosoremozojofam.epizy.com/seliwanoff_test_for_carbohydrates.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/bekaferuluriv.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_off0000ebe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE8 6060 bytes
SHA-256: e351f5532680723164b8babaa7a9459a3a8afb3ffea5f633f0f31294d69ce14e
font_01_sfnt_off00010073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10073 10916 bytes
SHA-256: c12cd61e6d3271513edd701c956af7a148c4efee3eab9f3403f273ff0324a454

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