Malicious PDF — malware analysis report

Static analysis result for SHA-256 35919d04ca1dc070…

MALICIOUS

PDF

50.0 KB Created: 2020-10-28 08:26:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: db7a36dbd274cae9dd9accd3dc388569 SHA-1: e33f9890b2b76ecafed1cc3a3c65aaafee7fb42f SHA-256: 35919d04ca1dc070bec64ab7e41e0b339220e5c44b1e44c372901e7efa5b0ca7
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a redirector to known malicious infrastructure. The document body, though heavily obfuscated, also contains URLs pointing to link farms, suggesting a coordinated effort to drive traffic to potentially harmful sites. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?keyword=sitting+still+like+a+frog+pdf In PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/fekawetodobuvaw-pulovub-bekexuxovasil.pdfIn PDF document text
    • https://redunexodozik.weebly.com/uploads/1/3/0/8/130814050/tusomufexovimow.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/pemuvavekenurikamik.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/c84743950.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/rezareludufiven-voxodopi.pdfIn PDF document text
    • https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/nizemizejalisu.pdfIn PDF document text
    • https://wudemivezetuf.weebly.com/uploads/1/3/4/3/134318680/1743a16.pdfIn PDF document text
    • https://voxapinave.weebly.com/uploads/1/3/2/7/132740917/rizujepupanok_rizadefizizoju_nadafixugena.pdfIn PDF document text
    • https://mogezisatizate.weebly.com/uploads/1/3/0/7/130775403/bamukumixuv.pdfIn PDF document text
    • https://zuwumepegowivos.weebly.com/uploads/1/3/1/0/131069935/zuguvubomawa.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/bokelur/official_beer_pong_rules.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/bennett_s_cardiac_arrhythmias.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/rivijaximopikar.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/an_astrologer_s_day_story_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2269/6096/files/18103095747.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5620/8307/files/lejijojog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6467/5490/files/tinukakiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7040/0928/files/14416895168.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7486/1250/files/3d_shooting_games_mod_apk_download.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/bihar_tet_previous_year_question_paper_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/71399077364.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/besigolizu.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/55663845534.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_off00006958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6958 5376 bytes
SHA-256: e062bd62825f850e5b0ebf7769041a10932e7bbb639ed80a5e2542f97d72bcff
font_01_sfnt_off00007bac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BAC 13512 bytes
SHA-256: 0d771b441fc2e94c61a137d85de3236168206adc2063fbe4e1acedf9db6d905e
font_02_sfnt_off0000a47f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA47F 16208 bytes
SHA-256: 0d7ec1c61551ac66d885f3770ed333a9fe5ad4dc15ae8fe0390d5d2abf76b1f1

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