Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c375b3162e1985f…

MALICIOUS

PDF

88.8 KB Created: 2021-03-22 10:51:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2f9f71427223b349486198ae7fe49f2d SHA-1: 9dc30c5bcefdf9b7593d69bbba3d862a68b0947c SHA-256: 1c375b3162e1985fe1c0fd909ceecf1e7c7889ecf2d5be40740cda9684bfdf48
186 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous external links, many pointing to disposable domains, suggesting a spam or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://gimoguvi.ru/award?keyword=angina+est%25C3%25A1vel+tratamento+pdf PDF link annotation
    • https://zowozenuzaf.weebly.com/uploads/1/3/1/8/131857278/2061111.pdfIn PDF document text
    • https://fezojobuxaboxo.weebly.com/uploads/1/3/1/0/131070559/9716861.pdfIn PDF document text
    • https://niforowekid.weebly.com/uploads/1/3/1/4/131406966/zodidixigen.pdfIn PDF document text
    • https://fugurisugo.weebly.com/uploads/1/3/6/0/136086283/1041342.pdfIn PDF document text
    • https://nawenakugod.weebly.com/uploads/1/3/6/0/136048640/65896b46d2f3.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://s3.amazonaws.com/bepukuba/excellence_resort_dominican_republic_el_carmen.pdfIn PDF document text
    • https://4c2674ec-1430-4cec-a455-d6a35d10586e.filesusr.com/ugd/38955b_a81edca8ebb54edba63131b8604d0159.pdf?index=trueIn PDF document text
    • http://tipopetudigovib.epizy.com/what_is_the_significance_of_2227.pdfIn PDF document text
    • https://356bbf58-84af-4bff-99a9-d03346e46411.filesusr.com/ugd/b5472a_ef2f182829cc44adb78fa7aba8d9d480.pdf?index=trueIn PDF document text
    • http://zimadiwiv.rf.gd/writing_inequalities_mathworksheets4kids.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/waxuvedufoligojow.pdfIn PDF document text
    • https://df1d5e35-4e67-4e57-ba41-6141a32c4ecb.filesusr.com/ugd/c54278_7af3cbb110244e22a387f5d8db331fac.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/custom_carbonless_contract_forms.pdfIn PDF document text
    • http://kegotetebam.epizy.com/vlookup_between_two_different_excel_sheets.pdfIn PDF document text
    • https://160e4e15-e27a-4ef2-9b26-f67fc0969a86.filesusr.com/ugd/cbdbb6_8d2fdaa6509249e0b70c3aaef631b8f3.pdf?index=trueIn PDF document text
    • https://4a0f17ac-6ce6-4c05-9546-25c48d39d9f7.filesusr.com/ugd/cd79e3_f5a1f30e919144b382f6153dad2f1972.pdf?index=trueIn PDF document text
    • https://df1882fa-13c5-42f1-8438-577935b594b9.filesusr.com/ugd/91932b_dc447cb5c4694cf7838abad956fe6383.pdf?index=trueIn PDF document text
    • http://jidowadosul.epizy.com/bench_press_form_dumbbell.pdfIn PDF document text
    • https://94aa8f26-b07a-4c24-bdb4-4112657565c9.filesusr.com/ugd/37428b_4e431edd13324e2da774313097bd9aef.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jobavo/benji_bananas_mod_apk_1._37.pdfIn PDF document text
    • https://1fa67a36-2e8b-44cc-a955-751d80433762.filesusr.com/ugd/d85e51_5b5f16c9160c4cf7ba380a158adece49.pdf?index=trueIn PDF document text
    • https://4bd9ed84-c80b-4837-bb2f-b1353ebfd8aa.filesusr.com/ugd/5a1791_30b9e28be7d84378a428ced87fcc728a.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_off00010b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B1D 5432 bytes
SHA-256: baadf940ce4b1aaba4ed1320d5794fca40214fac929afdfa93a9d0463c06ab89
font_01_sfnt_off00011cf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF5 13296 bytes
SHA-256: 24c4815903c3d57a7fbee4528ef9b82b120f112f0e2cf4744bbe354e77e648f3
font_02_sfnt_off000145a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145A8 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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