Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d4a0160cb2e97cd…

MALICIOUS

PDF

79.6 KB Created: 2021-03-26 06:50:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 04448ab4391547a852e9bab9d83175bb SHA-1: 45a4321ddf29bf1516648ed25028eb99e3741954 SHA-256: 5d4a0160cb2e97cd401612571f120ab87c1afc3b31a2cc47cc2d7f1741726afc
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable hosting, indicative of a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with attempts to trick users into downloading further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://vilenefex.ru/award?keyword=bonjour+tristesse+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408589/normal_602bed6a22295.pdfIn PDF document text
    • https://cdn.sqhk.co/bexefoboxevi/ghE8jdm/vanabapurigomoxorelusatu.pdfIn PDF document text
    • http://bcpzonasegurape2-viabcp.com/majora_s_mask_n64_guidegbfh5.pdfIn PDF document text
    • http://mif-smeh.space/business_english_reading_comprehensionm4v18.pdfIn PDF document text
    • https://cdn.sqhk.co/vameduvide/hirPhhF/22280350347.pdfIn PDF document text
    • http://erogan-oficial.site/45161766862ritcw.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosexotak/bpshdia/89732474218.pdfIn PDF document text
    • https://cdn.sqhk.co/teketerep/ghhhgeh/drag_sport_bike_wallpaper_hd_for_mobile.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479460/normal_5fdfb841283d5.pdfIn PDF document text
    • https://cdn.sqhk.co/daxozazon/hiuPidA/slap_kings_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489595/normal_601b19f617576.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465024/normal_5fd8c6608fff7.pdfIn PDF document text
    • http://healthytrands.com/edukondalavada_venkataramana_govinda_govinda_mp3_free_downloadvyaa3.pdfIn PDF document text
    • http://vipadminler.org/programma_gratuito_per_scrivere_su_in_italiano9yx4c.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
    • http://kisuneronebel.rf.gd/87175404994.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05d317ec-40c4-42fd-92c8-00f9472e3586/79734387384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a228be72-016c-4330-b976-99824308d38e/volume_price_analysis_anna_coulling.pdfIn PDF document text
    • http://vomalowo.epizy.com/jogun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82eaeb37-4324-4d33-8fbb-2a6bcc5823ce/nitofezurajekotapatu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9467e5b-ef98-4b60-8c52-8bec3544373a/lawn_boy_transmission_repair.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/693e07ae-39f3-4ddf-935b-356f717580cc/best_quote_about_happiness.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aa105bb-9b9f-48f6-a1ef-b0dfdc0a81af/samsung_galaxy_grand_prime_plus_display_price_in_sri_lanka.pdfIn PDF document text
    • http://kagiwabiluwotel.epizy.com/pneumatic_solenoid_valve_types.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_off0000e9a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A6 5136 bytes
SHA-256: 3c004aeeb0b27ce1cee4dc6cc55bcb258ff0c425e8d75d9e03e475045e06f49c
font_01_sfnt_off0000fb37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB37 11248 bytes
SHA-256: dad127d0952e755541315b148d702ceb59cdc44ce05e0c7d76f67cf5884936ac
font_02_sfnt_off0001210e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1210E 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c