Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d6a18738d858fe2…

MALICIOUS

PDF

74.9 KB Created: 2021-03-09 13:44:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 34a8a202d4c2b44033d9dd8c5a876735 SHA-1: 96f68081f6f8a8450657fef4c7c6d7c9484a485a SHA-256: 0d6a18738d858fe2dae0bf6f8c5c60578e7cefd08f5b3d602f8c9b60d7c4c350
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains embedded URLs that point to disposable hosting and link farms, suggesting an attempt to distribute malware or phish for information. The document body, though heavily obfuscated, contains references to 'Android os pdf free download' and 'wkhtmltopdf', likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://soxebez.ru/award?keyword=android+os+pdf+free+download PDF link annotation
    • http://pefiworawodud.mypressonline.com/pandas_select_rows_by_index_multiindex.pdfIn PDF document text
    • http://wivevadevenumet.mywebcommunity.org/kavezamexatafin.pdfIn PDF document text
    • http://ketosimple.online/votexojudunu2yxtg.pdfIn PDF document text
    • http://saleproducts.pro/worksheet_mixed_gas_law_worksheet_answer_keyif5la.pdfIn PDF document text
    • http://xavolavuduxi.22web.org/contraception_journal_author_guidelines.pdfIn PDF document text
    • http://zalavsky.ru/breaking_indianapolis_newsvpr2t.pdfIn PDF document text
    • http://tapabafana.22web.org/kujej.pdfIn PDF document text
    • http://vkysnaya-eda.site/how_much_weight_can_you_lose_on_the_warrior_dietieduy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sogonuvusawi.epizy.com/96373504553.pdfIn PDF document text
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_65e33b1315604fc1a1ad0c78a7e013be.pdf?index=trueIn PDF document text
    • http://lesiterifok.epizy.com/vabosu.pdfIn PDF document text
    • http://xovapigebiz.rf.gd/who_said_we_are_the_universe_experiencing_itself.pdfIn PDF document text
    • http://xubumanazi.rf.gd/how_to_write_a_script_for_actors.pdfIn PDF document text
    • http://tujatubaniza.epizy.com/what_is_another_word_for_then.pdfIn PDF document text
    • http://meganisaniwo.rf.gd/boca_do_inferno_ana_miranda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1e1c329-2c2d-4eca-9c99-e1d1d6c5065e/dnd_5e_phantasmal_force_ideas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92225727-aa69-4189-a95e-3fff98ffd583/19989039215.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2dca0fe-54a4-4ff9-bfc2-6e3c2f26058e/kikedifupesesexobufe.pdfIn PDF document text
    • https://3633ae4e-9acc-45df-885e-1bfa1481cb44.filesusr.com/ugd/e73054_7ae3518500944c25b9ce23d052a85cc6.pdf?index=trueIn PDF document text
    • http://tafiwepamubov.atwebpages.com/77871189648.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73375895-913a-4f5f-a61c-fa1938bf84fd/38727906709.pdfIn PDF document text
    • http://demumerip.rf.gd/69371318676.pdfIn PDF document text
    • http://watusatuvor.myartsonline.com/what_is_social_research_and_its_characteristics.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_off0000e95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95A 5116 bytes
SHA-256: 184b274056da4f4b2dce9eb3d5ccb16a4484cc5604e27fe6b657ff2fdcd1ade6
font_01_sfnt_off0000fae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE7 10240 bytes
SHA-256: 3d85e3c94d3187729f0966ff9959daf363bd24f7dd39c8a77bf08eb3b365b4ee

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