Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea37095b0e255f4a…

MALICIOUS

PDF

80.4 KB Created: 2021-04-01 00:50:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: cad4bc02f9c31bcc95f0410fb1f6f167 SHA-1: 260a9e13a42d7b9b7b618ec09dc2e9e6f278c47a SHA-256: ea37095b0e255f4a2fe05cf41a1fe2489934210e5e72f696f5e9551d9cf898f9
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are generated SEO-style slugs, indicating a link farm or content manipulation tactic. The primary URL, https://mezovuduw.ru/strik, appears to be the intended destination, possibly for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest malicious intent related to link manipulation and external resource engagement.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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://mezovuduw.ru/strik?utm_term=where+to+buy+a+good+used+treadmill PDF link annotation
    • http://wuxapogetal.iblogger.org/audio_technica_lp60_replace_belt.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/miledu/brackets_for_kali_linux.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/collage_maker_program_free.pdfIn PDF document text
    • https://7031c68c-cf47-488c-b9bd-b344696616f5.filesusr.com/ugd/51e9e9_fa0db99348d84b59b9fcc5b9f7465a1a.pdf?index=trueIn PDF document text
    • http://ropofijegeja.epizy.com/acknowledgement_section_of_a_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6736c82c-beb3-493e-9d72-5593909cb340/wulopoxejesowewuvasat.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/dire_maul_east_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/67349245956.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/virgin_coconut_oil_chemical_structure.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/zobedukudufekevuma.pdfIn PDF document text
    • https://300a1258-3b13-45f7-80b9-bd8966f45320.filesusr.com/ugd/81888a_d078ff9447d44d238d5718ac8340e604.pdf?index=trueIn PDF document text
    • http://surewefuwiba.rf.gd/59166999237.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/vepalumuwotemanefimakog.pdfIn PDF document text
    • https://f89b8795-a90f-4359-81e0-6309601a98d9.filesusr.com/ugd/8e7730_83637ff217194d7bb133820e051409e2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/93702803447.pdfIn PDF document text
    • https://994180ce-385f-4272-9833-4a204a825e0f.filesusr.com/ugd/ec0c41_d600a8b785e94f82bef83d71e3355ac6.pdf?index=trueIn PDF document text
    • https://2d2b1dae-c014-4902-97e6-c3f1d56915cd.filesusr.com/ugd/70e5f7_7a52f3c3c7d64a1694f5be376e7f3790.pdf?index=trueIn PDF document text
    • https://7afd96e6-4611-46d4-9b98-d111b897c281.filesusr.com/ugd/154221_c6909b8882114e769b240ec80d8b356b.pdf?index=trueIn PDF document text
    • https://4adff18d-dc39-4349-be2c-eeb12737f1cb.filesusr.com/ugd/9117e0_226e687e5e4748ba97d13818553f98f9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e0276d8-827e-4d04-8416-39a1b899c3cc/what_documents_do_i_need_to_renew_my_cdl_in_texas.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/48731814823.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_off0000fb63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB63 5496 bytes
SHA-256: 2962cd1d6f65ddf2693405391be7864201a0953f76d572ab15a0f6bd7d6086a4
font_01_sfnt_off00010df7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF7 11204 bytes
SHA-256: 0bd7a596888377d8d6b6ded0b5597a8cf874fb4371d71abc65b2a9ea0ded6920

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