Malicious PDF — malware analysis report

Static analysis result for SHA-256 d614c52e91640a8c…

MALICIOUS

PDF

75.6 KB Created: 2021-02-25 22:07:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3249793300cf7080f5e6f1f7e49017e0 SHA-1: dc6199619933f4e0af25e553abcd081403427cca SHA-256: d614c52e91640a8cb893333d23f1dcf32089994068d79df0019a2d2f39b11e2d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, many of which are disguised as search results for popular content, leading to other PDF files hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://maypoin.ru/strik?utm_term=bruce+lee+tamil+songs+download+320kbps PDF link annotation
    • http://insta-sale.site/wikemopwvi2b.pdfIn PDF document text
    • https://cdn.sqhk.co/zowesifona/jihjzYw/gabiwurafopexajofexezuto.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382406/normal_5fec42149e46a.pdfIn PDF document text
    • https://gijesilikisuzid.weebly.com/uploads/1/3/2/6/132683000/dawimijetenive-kavabuxevemem-sawuwibi.pdfIn PDF document text
    • http://aycotoro5.xyz/141796901945zrc0.pdfIn PDF document text
    • http://haustova.com/big_little_lies_male_cast_season_2_lawyerfl57i.pdfIn PDF document text
    • https://woxazalaxit.weebly.com/uploads/1/3/4/2/134235403/fuferunexe-xanejomi-vojafuwoja.pdfIn PDF document text
    • https://cdn.sqhk.co/pisapaxosabo/egjowgh/37383253340.pdfIn PDF document text
    • https://dofikusoru.weebly.com/uploads/1/3/4/4/134472045/1670d3d17.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415518/normal_600402ec0c4b1.pdfIn PDF document text
    • http://biweekamnf.com/16409105738cb4us.pdfIn PDF document text
    • http://pubguckazan.com/nisolaxuvefavumozudujozpmick.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482403/normal_5fdd5fab7d014.pdfIn PDF document text
    • http://rineset.xyz/dabanivobemezix7ivc0.pdfIn PDF document text
    • http://gufutaca5.xyz/328149060638hfzk.pdfIn PDF document text
    • https://cdn.sqhk.co/poronujefino/iQhio21/42208515705.pdfIn PDF document text
    • https://fakegegi.weebly.com/uploads/1/3/5/3/135312823/4434236.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/qUbidcr/8156929624.pdfIn PDF document text
    • http://thesimplycompleteseries.com/postknight_ring_guidenuq76.pdfIn PDF document text
    • https://cdn.sqhk.co/nezerozara/gghfYhc/easy_pay_login.pdfIn PDF document text
    • http://1ux.site/where_can_i_donate_clothes_near_me_today27wpp.pdfIn PDF document text
    • http://youtube-subscribes.com/xezesixamorapivoriv46uwg.pdfIn PDF document text
    • http://roflan.site/acer_laptop_prices_in_sri_lanka8lq75.pdfIn PDF document text
    • http://tegor.xyz/2019_amc_10a_25ik9oa.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://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_off0000da7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7A 6060 bytes
SHA-256: 4698903199f50a1879e8173bcbfd7cc1401c45356ab3a84ac68466b736d5466e
font_01_sfnt_off0000ef0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0A 10316 bytes
SHA-256: 42ea55d134aac0881277bbec358f3d7b07e60dcafbc1d380e67e3952bca3758c
font_02_sfnt_off00011203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11203 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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