Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a38aab4887d1bd2…

MALICIOUS

PDF

79.6 KB Created: 2021-03-24 12:27:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 3335fcc350a69c574dcbc5a5b14bbbdf SHA-1: e4ab3cd9bdadfc66fb1d8755fa5006ebc709400b SHA-256: 7a38aab4887d1bd22a1cb9507d78c9654df05c932882f8c58bb002e0b5cebe64
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. The presence of a PDF_SEO_LINK_FARM heuristic firing further supports this. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to potentially malicious sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://pelibifir.ru/award?keyword=verbal+bullying+research+paper+pdf PDF link annotation
    • https://cdn.sqhk.co/baluwofuk/hepzjdS/wholesale_bingo_supplies_near_me.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/59925813263.pdfIn PDF document text
    • https://cdn.sqhk.co/nigalasiline/jjcibCv/vexed_meaning_in_the_bible.pdfIn PDF document text
    • https://cdn.sqhk.co/nimotixalulo/h5rR2hK/90369577399.pdfIn PDF document text
    • https://cdn.sqhk.co/dokukavifig/hgjlyyX/leadership_management_skills_matrix.pdfIn PDF document text
    • https://cdn.sqhk.co/siwebove/icpTjie/crude_oil_price_live_chart_uk.pdfIn PDF document text
    • http://modezewop.mygamesonline.org/wutefogaxojesotazigix.pdfIn PDF document text
    • https://cdn.sqhk.co/jinubodilev/ggSSjhE/download_super_city_superhero_sim_latest_version.pdfIn PDF document text
    • https://cdn.sqhk.co/dikapagoloza/eELjiji/cute_things_to_do_list_printable.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
    • https://e8f98835-b194-42a5-b43f-fe2f29920dd6.filesusr.com/ugd/bf650e_05c5a156d3e4494082ee6c7e9f629f34.pdf?index=trueIn PDF document text
    • https://8e6fe9cb-6e01-49b8-a8bf-add1d7538daa.filesusr.com/ugd/4e948c_1a4c885f3f0a4f21b86f426be6c14d59.pdf?index=trueIn PDF document text
    • https://d8acad56-eb9a-42d1-a06c-a695c5b02328.filesusr.com/ugd/0ad6c7_729709bb2a60476998a7e2073ec9da4f.pdf?index=trueIn PDF document text
    • https://e7f45dcf-1957-410e-85b1-216e85a225c4.filesusr.com/ugd/a2c2bc_438425523efb4efd8fd165f862fad1ce.pdf?index=trueIn PDF document text
    • https://858e1da1-ad31-4e5b-aec0-89c59c6c71f6.filesusr.com/ugd/6240f8_3484f42779c94184a95800a7aad98cb1.pdf?index=trueIn PDF document text
    • https://c064424b-11a8-4e39-a524-24a74bcd733d.filesusr.com/ugd/54e393_b8e55097f9304e989d53b6d5cacb8c69.pdf?index=trueIn PDF document text
    • https://736f3f86-ac4a-4d06-be6b-3320275ea8ee.filesusr.com/ugd/cd27d0_1fdfc171c0c44adb838df1186e10b8b9.pdf?index=trueIn PDF document text
    • https://56db2a4d-09ce-4ff6-a558-abb1d6727cd4.filesusr.com/ugd/003b86_dea6f127f6174320b634e43f25972921.pdf?index=trueIn PDF document text
    • https://0feddc0e-03bc-46a3-a741-45303deff239.filesusr.com/ugd/6ea6a2_66a47de33bf64fb4add75c3582a6296f.pdf?index=trueIn PDF document text
    • https://20996a60-9695-4f45-8fdb-44bdc783da55.filesusr.com/ugd/c57cae_67e85c24447e48ce875776bb2df02906.pdf?index=trueIn PDF document text
    • https://e924225a-aa46-4bfc-8e56-7341551e1833.filesusr.com/ugd/54dfea_e761bff8dcc04fe3b006113684faf474.pdf?index=trueIn 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_off0000ea42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA42 5316 bytes
SHA-256: 403edd7a40e6399c4dd15a3316a1186508617445ccc764a8d1092a33226fac8c
font_01_sfnt_off0000fc3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3E 10796 bytes
SHA-256: 4a70d3c1c6b7d1db447a87317dce8a59bb97f9262a70d7d8c081e1b67e78f905
font_02_sfnt_off000120d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120D7 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

Open this report in the interactive analyzer, or submit your own file for analysis.