Malicious PDF — malware analysis report

Static analysis result for SHA-256 216a0ed156d8f389…

MALICIOUS

PDF

94.7 KB Created: 2021-05-07 00:36:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 03fc7dd34a4a5f7d7d3caf256cae613a SHA-1: cecf7f33bde752d94c08625fb3a2daaf5f4e13ec SHA-256: 216a0ed156d8f3891c05ef5d07f02b447478480668423d245b3fa2a264818335
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious content. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm designed to redirect users. The document body, though heavily obfuscated, suggests a lure related to 'psychology how to read people's body language', which is likely a pretext to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://jumiwimov.ru/strik?utm_term=psychology+how+to+read+people%2527s+body+language PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4485442/normal_60055add8169f.pdfIn PDF document text
    • http://japamawosoj.mygamesonline.org/what_to_invest_in_2021_long_term.pdfIn PDF document text
    • http://simultaneously.space/atomistique_exercices_et_corrigs1e8gg.pdfIn PDF document text
    • http://zukesijinizik.mywebcommunity.org/7009817066.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470545/normal_60303fe699edc.pdfIn PDF document text
    • http://fudoviwil.mywebcommunity.org/illustrated_course_guide_microsoft_excel_2020_advanced.pdfIn PDF document text
    • http://saniwofixapu.mygamesonline.org/avivamento_do_pais_de_gales.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455639/normal_5fc5dac4296b9.pdfIn PDF document text
    • http://lukufogud.getenjoyment.net/financial_business_plan_sample.pdfIn PDF document text
    • http://idealicaitalia-ufficiale.site/nekedujusosu71la4.pdfIn PDF document text
    • http://fipagolanikobax.mygamesonline.org/buku_belajar_membaca_anak_sd_kelas_1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473064/normal_6012089b291ab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://molagegivijoxu.onlinewebshop.net/the_rings_of_standing_stones_at_craigh_na_dun.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/full_movie_free_for_mobile.pdfIn PDF document text
    • http://kexibuxufo.epizy.com/zudojorodanig.pdfIn PDF document text
    • http://mowigefugitixa.epizy.com/asus_xonar_dg_audio_device_windows_10.pdfIn PDF document text
    • http://sanugifop.atwebpages.com/supamadu.pdfIn PDF document text
    • http://juludiripo.myartsonline.com/norukegepajij.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/53843402181.pdfIn PDF document text
    • http://taxupot.rf.gd/english_meaning_dictionary_app.pdfIn PDF document text
    • http://sobovag.rf.gd/zemeroruwenubap.pdfIn PDF document text
    • http://bejopobu.epizy.com/10476591188.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B0B 5704 bytes
SHA-256: 816506db0c198c87ade522dc0aa31de2e95bca4f31bf17babb24a7ae311fecad
font_01_sfnt_off00012e84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E84 11652 bytes
SHA-256: cb7988f46d81fdbc581276863bd59546fef5f0842749f54790bc70a0c0c0ea8a
font_02_sfnt_off00015634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15634 16192 bytes
SHA-256: 10dd024b7aca9c0af4782f0042823f5a6a937774ccb4b3ed12dd2ab58f6a5f2d

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