Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1995542a5613cfa…

MALICIOUS

PDF

86.4 KB Created: 2021-03-19 09:30:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 51c6d08b5a2351e8b7457abe2035a8b7 SHA-1: 747f4a5625c26929b52639dff855176c05183de9 SHA-256: b1995542a5613cfa2410e3801396a52a76dbdbca00b84fac47d7fb5594155922
126 Risk Score

Malware Insights

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

The PDF document contains numerous external URIs, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to 'Better furnaces mod 1.7.10', indicating a phishing or malware distribution attempt. The presence of embedded URLs and the link farm heuristic strongly suggest the document's primary purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/wix?keyword=better+furnaces+mod+1.7.10 PDF link annotation
    • http://berozava.iblogger.org/only_fools_and_horses_quiz_with_answers.pdfIn PDF document text
    • http://metiwizonud.getenjoyment.net/tigekekogazoritova.pdfIn PDF document text
    • http://donbetosstreettacos.com/multi_level_marketing_companies_for_guysjucuc.pdfIn PDF document text
    • https://livaruzurakit.weebly.com/uploads/1/3/4/4/134432061/ace5b83960.pdfIn PDF document text
    • https://mafoxoluz.weebly.com/uploads/1/3/1/4/131483222/zefoxuvebimi-jawiliwoteka-bimaj-julexu.pdfIn PDF document text
    • http://rulabepotinujeb.mypressonline.com/43828503331.pdfIn PDF document text
    • http://mokaxizekebade.scienceontheweb.net/starbucks_uk_menu.pdfIn PDF document text
    • http://mizarofu.22web.org/target_threshold_fitted_sheet.pdfIn PDF document text
    • http://navalny.design/ap_human_geography_2019_frq_set_2h8lxk.pdfIn PDF document text
    • https://zotizoju.weebly.com/uploads/1/3/5/3/135349435/lezuv_lubajusorokovus_sopale.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/roxejitigawiwalavemidoso.pdfIn PDF document text
    • http://kieverts.xyz/faxakalemigujatuwpami.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/70b47f27-0789-429c-9d00-85e4a63d6a5d/madina_book_1_vocabulary.pdfIn PDF document text
    • http://vovajixavago.epizy.com/watibiwidax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d90b7c72-bbdf-4ece-90dd-8ca864b0453a/pituwobipiruruxem.pdfIn PDF document text
    • https://e26976e3-f089-44cc-a2a6-54bcc6cae308.filesusr.com/ugd/0df15e_e37ce2e900124e6b8127f26266f8698d.pdf?index=trueIn PDF document text
    • https://51da6a7d-ee05-4a49-87ee-1b74af3aeb07.filesusr.com/ugd/b80405_9f7b87adeeab4f1c95ed3173eb01de8b.pdf?index=trueIn PDF document text
    • https://f38be386-5799-403b-9303-fb121113655a.filesusr.com/ugd/6f1aa7_8d9a883e065e44a6b7e6a01a593909b8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3605c547-4175-4312-9371-cb574376f857/43640399175.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66f90f1e-b5b1-44da-b07f-216a92ce06ae/how_much_does_a_scag_turf_tiger_weight.pdfIn PDF document text
    • https://6205d428-d5dc-494e-bbc3-e2236f9d811e.filesusr.com/ugd/6885a6_26a2d8a51ed54fe6b1bdec4d6a8d819e.pdf?index=trueIn PDF document text
    • http://mikipifovusi.epizy.com/95711065203.pdfIn PDF document text
    • https://ae26bae5-b1f3-4fb2-a0ba-5d2f2d23988c.filesusr.com/ugd/aec2ea_b089844b886b454589bfdf8a2851a993.pdf?index=trueIn PDF document text
    • http://rofexivagonipuz.rf.gd/scratch_3.0_tutorial_how_to_make_a_platformer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af59613a-9560-40f6-bfd0-61676e31b15f/my_garmin_nuvi_40_will_not_turn_on.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_off00011286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11286 5488 bytes
SHA-256: 823cab021d8f6f85daf3d09f533260b99a66ef33d6870ee18736f82ef0ee6784
font_01_sfnt_off0001252e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1252E 11432 bytes
SHA-256: 979bd1d4e58f05b96947ca2fce7646985a85ea83bccd2215b1d758b6a63a1480