Malicious PDF — malware analysis report

Static analysis result for SHA-256 bead2633763ec4ae…

MALICIOUS

PDF

77.3 KB Created: 2021-06-03 04:40:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 949c9246829d0e6883a20213dba99ee4 SHA-1: 1995104d07edfa933d4b1fdc22789bde8e1ba107 SHA-256: bead2633763ec4ae001a753dfe505f624df664f038f47dab8a880b711acfe849
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://irlanc.ru/pbw?utm_term=nero+7+ultra+edition+free+download+full+version PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4469831/normal_60b07bc1196be.pdfIn PDF document text
    • https://rofasotukez.weebly.com/uploads/1/3/0/7/130740205/abbd974663cfad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447877/normal_602d43859a72c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393763/normal_5fda02f528c05.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4409393/normal_60b336a058d17.pdfIn PDF document text
    • https://jexadafiveti.weebly.com/uploads/1/3/4/7/134765621/tugig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366354/normal_5fd146ed7bd02.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/1a711572-2227-4bae-a531-e2bd8d36e9bf/57293658351.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88e59106-8af4-4ef2-a28b-e8ea04ca65a9/jugelebogunixevuza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cae8cc8-a442-4e75-bc8e-60ca2bb9a632/43632028112.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb4b0a9a-f13e-467c-a889-f1fb8d117806/what_is_the_main_theme_of_the_poem_ode_to_a_nightingale.pdfIn PDF document text
    • http://tosuvop.pbworks.com/w/file/fetch/144467685/38046437549.pdfIn PDF document text
    • http://ridelox.pbworks.com/w/file/fetch/144457614/what_did_brinkmanship_do.pdfIn PDF document text
    • http://xoxafepapesu.pbworks.com/f/screen_recorder_with_facecam_and_audio_video_editor_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f490eff0-3c65-4a58-93e4-a9cb74f8f6e3/perfecting_your_english_pronunciation_audio_vk.pdfIn PDF document text
    • http://ruxafonan.pbworks.com/f/piggy_boom_mod_apk_android_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/802e78ae-623a-47c6-90ed-74655b5235b0/edenpure_heater_gen_4_parts.pdfIn PDF document text
    • http://wenuveraroto.pbworks.com/f/how_to_know_turbo_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37085aab-d4f2-4a21-82b2-27f6051d5d5b/5322421323.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ba131e1-81be-46a4-87c8-7cc134305c2c/disney_abc_coloring_pages.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB8 4984 bytes
SHA-256: 4cd12cd2bbbf9d6f721f934bdfae7baa86a91ca0bb230781754f49dbb067fb42
font_01_sfnt_off0000eed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED8 12880 bytes
SHA-256: 2710a0905a1d2b9b5749f9ef16bcddeee469a7da93bec923d847ea5d22949849
font_02_sfnt_off0001173f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1173F 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c