Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c03315b44db044c…

MALICIOUS

PDF

86.1 KB Created: 2021-04-03 18:55:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 030a13b399922d1348037376903d3873 SHA-1: 6e3f5a86473b38f857df42c9b79d964c9395c681 SHA-256: 3c03315b44db044c9d05af7f8b80cde1859d3de321c283a7732e12ddde928c02
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, including one that appears to be a phishing lure for 'Tibetan book of the dead pdf download'. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains references to these URLs, suggesting the primary purpose is to redirect users to potentially 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://nipisod.ru/strik?utm_term=tibetan+book+of+the+dead+pdf+download PDF link annotation
    • http://xirapanagix.getenjoyment.net/literary_devices_ks2.pdfIn PDF document text
    • https://nozijuga.weebly.com/uploads/1/3/4/6/134698325/zezomulipowid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417827/normal_60321f6593ad9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453134/normal_603891ad7642a.pdfIn PDF document text
    • http://vukuradi.mygamesonline.org/vujiweruwosij.pdfIn PDF document text
    • https://cdn.sqhk.co/wezufunin/ghIP5ih/fast_rider_moto_bike_racing_mod_apk.pdfIn PDF document text
    • https://guvorike.weebly.com/uploads/1/3/4/2/134266232/3c1ea7.pdfIn PDF document text
    • https://cdn.sqhk.co/tosilura/q2Ojdpc/radiologist_assistant_schooling.pdfIn PDF document text
    • https://cdn.sqhk.co/dopebuxoz/ji6Ggzb/pobugesakezapuboxasilul.pdfIn PDF document text
    • https://cdn.sqhk.co/vomawoko/jcHgjsk/vector_addition_and_subtraction_analytical_methods.pdfIn PDF document text
    • https://fuzimisadu.weebly.com/uploads/1/3/5/3/135319831/tikaviwawisagazasuju.pdfIn PDF document text
    • http://jefevivavifax.scienceontheweb.net/10940234961.pdfIn PDF document text
    • http://zedakobogesa.mypressonline.com/periapical_abscess_treatment.pdfIn PDF document text
    • https://cdn.sqhk.co/puranajav/dibjdSe/lazunowokegal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4526930/normal_605c96b68e62d.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/d1661425-dc92-48e0-a0ea-342befab44be/how_to_change_the_battery_in_a_womens_timex_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2bcf0f9-b9d7-4008-80df-f1b5f58f6dde/8208475520.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f42f1f8b-b07f-4850-88e2-7551265aeac1/2006_mercury_25_hp_4_stroke_weight.pdfIn PDF document text
    • http://davofunup.onlinewebshop.net/kuwed.pdfIn PDF document text
    • http://wodowepakimeko.onlinewebshop.net/arsenic_toxicity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daea5aac-97dc-44b1-92a4-fc2633b6f783/how_to_configure_netgear_smart_switch.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD9 9544 bytes
SHA-256: fd10c73c56380980577e4c8a48a3a6d6dce32ab9c795ca872cc1a1974e55182a
font_01_sfnt_off0000f64b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64B 5100 bytes
SHA-256: cc5e79ecce570abac408e57759cc65bc956abc33bf6db46522b88619147507ee
font_02_sfnt_off000107ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107BA 11624 bytes
SHA-256: ebce0af1e0245430b32cd3fe8ba5cff34f9057fb78c5d1dd603b294c2f77207e
font_03_sfnt_off00012e41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E41 18264 bytes
SHA-256: f1467b823e4e9ce92520941f0e4574ebb0f4ee73926e6a891d8d4ad69d90d7b3