Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ecd3c37d6985713…

MALICIOUS

PDF

86.7 KB Created: 2021-03-25 15:55:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: e12068ffd20158a659bddf9bc8ba0804 SHA-1: 14d1b0dfc238523691bb5eb821ccbd8f21a95532 SHA-256: 1ecd3c37d6985713fa7696c81fe8286a21307540537d5d18bd79a205b674f6fb
126 Risk Score

Malware Insights

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

The sample is a PDF document flagged by multiple heuristics, including a critical ClamAV detection for phishing and a high ML score for maliciousness. The document body, though partially obfuscated, contains references to an appliance error code, likely a lure. The primary IOC is a URL pointing to a suspicious domain, which is likely used to host a malicious payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • 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://gimoguvi.ru/strik?utm_term=lg+inverter+direct+drive+dishwasher+error+code+oe PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4503035/normal_60462997439cc.pdfIn PDF document text
    • http://distornyup.site/37375372039q5gwo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392452/normal_60255462c32fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391305/normal_6041fc525223b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384634/normal_60034a7cdef63.pdfIn PDF document text
    • https://cdn.sqhk.co/niserutom/n0nbhgA/motosport_roanoke_roanoke_va.pdfIn PDF document text
    • http://shop-kid-toys.online/con_que_trabaja_tu_amiga._que_se_mud_a_portobelo._2._que_vende_muebles_baratos._que_trabajbamosd1tco.pdfIn PDF document text
    • https://cdn.sqhk.co/zimajigon/iie6Kui/firefibejowibuwanekuwur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367283/normal_600fa60b4b4f0.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/oFZibio/voicemod_android_app_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385021/normal_6058310d291fa.pdfIn PDF document text
    • https://cdn.sqhk.co/revukone/Yjcgeie/microsoft_word_label_template_14_per_page.pdfIn PDF document text
    • https://cdn.sqhk.co/zibumimuw/bhdgfyL/candy_crush_saga_apk_new_version.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470833/normal_60068d7c29d92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388813/normal_5fe62b9a41db4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426687/normal_6057967d0dc77.pdfIn PDF document text
    • http://flymoney.net/ayurveda_gujarati_booksh83ja.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/jotizifime/what_do_mean_by_otto_cycle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79fc9927-20a3-4d1f-87e2-4cd36e95c6b3/35640586732.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/wibasakevidakakat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e95c1c8e-641f-42a6-9a8d-a0b7556faa2d/57390738668.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/zutosotumesegegitarojeta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45e638a3-1b8c-4a07-9b3e-2e614a830d09/97049519340.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/attorney_general_payment_information.pdfIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/78382580802.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_off000114ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114FF 5260 bytes
SHA-256: 4ce3bc895d18c0c4c2cf0cf3b3a0765e756856b619636f723ca50ab3ded3c75f
font_01_sfnt_off000126ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126FF 11328 bytes
SHA-256: 0787f99d883853b951c8fa1f09254e64cc3c07b9e6b4bef10927f69296b1d846