Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2fcbf0d9dfafafc…

MALICIOUS

PDF

83.5 KB Created: 2021-05-12 15:49:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 014234cae44275e6b4db27dff5ea7cd6 SHA-1: 5ef86240b82e56ade111305eb0b740a74c8a71d7 SHA-256: d2fcbf0d9dfafafc225616ec0614f37adbd2c9b70c862bed27b737e008c509b2
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains keywords related to IQ tests and book chapters, aligning with common social engineering lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://druttle.ru/strik?utm_term=iq+test+questions+with+answers+pdf+in+tamil PDF link annotation
    • https://cdn.sqhk.co/figegixo/xjb5HBG/the_silent_age_chapter_3.pdfIn PDF document text
    • http://4gusevshop.space/degabupixizuvimupitublexx0.pdfIn PDF document text
    • https://cdn.sqhk.co/dagozuwemep/gitjjhf/tusubanazufidelu.pdfIn PDF document text
    • https://cdn.sqhk.co/riwifesineji/xhfigRl/rolling_stones_t_shirt_primark.pdfIn PDF document text
    • http://bugilinupapud.mygamesonline.org/48599052188.pdfIn PDF document text
    • https://cdn.sqhk.co/tilesoxeg/idibjhJ/mendeley_apa_citation_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404975/normal_5ff37d6000c7a.pdfIn PDF document text
    • https://cdn.sqhk.co/sugezigo/ajhWicv/6400787136.pdfIn PDF document text
    • http://lovelyhouse.online/35973459038oyl9q.pdfIn PDF document text
    • https://cdn.sqhk.co/bavomizobe/ifE1ges/xegozijonumovesufejano.pdfIn PDF document text
    • https://cdn.sqhk.co/zeritogekuja/diaFhgD/droplist_streetwear_sneaker_release_information.pdfIn PDF document text
    • https://cdn.sqhk.co/kojivitew/3hihjha/assistant_acquisition_manager_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/tifatuju/7tVibnh/iron_bottle_opener_anniversary.pdfIn PDF document text
    • http://rokuboxajiga.medianewsonline.com/xexirisikaja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458827/normal_5fd2c3a8cb379.pdfIn PDF document text
    • https://cdn.sqhk.co/jibezilesu/gizgdgf/paintball_guns_price_ebay.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403688/normal_6004901151354.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/aleko_gate_opener_installation.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc3f1972-3bed-4463-91bf-96257637c43a/bosch_silence_plus_44_dba_water_not_draining.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39cf598e-a786-4c97-9c32-a75124125988/daxekitonakiji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a97b378-4dd0-40e1-a329-9322913a8c39/how_long_do_ryobi_40v_batteries_last.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a02f517-731e-4728-a745-cc0dfb9e36d8/samsung_smart_care_vrt_plus_washer_ur_code.pdfIn PDF document text
    • http://zalatikewal.atwebpages.com/belajar_bahasa_arab_bagi_pemula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bb3f7f1-4af9-4c64-acd8-27a300ffdd9b/timex_clock_radio_manual_dual_alarm.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_off0000e14f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14F 5436 bytes
SHA-256: 3f11ef060a4c60f09e19e949333c76159195640ef58f9a75fa0b45be37198093
font_01_sfnt_off0000f3b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B3 15136 bytes
SHA-256: 477a720de290bd3a7de24e6338d8896b57d9ed8e7c94dc847b259210766549d7
font_02_sfnt_off000116b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B5 11128 bytes
SHA-256: e957513f4a1389375f8343150d5e64c4840f5c89235a215072fc205a11f60db8