Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f15d71db767cc57…

MALICIOUS

PDF

90.1 KB Created: 2021-03-18 19:03:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: cf814241b7b18cfe324b27811f07da72 SHA-1: a722007fbfccdfa1bf897dcdcbabb49e926c62f5 SHA-256: 7f15d71db767cc579ed06ea4464d1fe6e0e56b45ca8715cc023bd55ff7bbb0f0
126 Risk Score

Malware Insights

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

The PDF file, identified as malicious by ML classifiers and ClamAV, contains numerous embedded URLs, many of which point to disposable domains. The document body, though heavily obfuscated, suggests a lure related to publishing a book on Amazon Canada, likely to direct users to malicious sites like https://ponafet.ru/strik. The presence of external URIs and link farm characteristics indicates a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 5

  • 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 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://ponafet.ru/strik?utm_term=how+to+publish+a+book+on+amazon+canada PDF link annotation
    • http://gosunenibunale.getenjoyment.net/53506184322.pdfIn PDF document text
    • http://netopodimamo.mywebcommunity.org/what_is_alla_primavera.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/39365821179.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452612/normal_60442ee2e3921.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474456/normal_5ff30314d1579.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415754/normal_604cc133c5a16.pdfIn PDF document text
    • http://kutegexuwudaro.getenjoyment.net/paraiso_perdido_john_milton_espaol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382629/normal_5fe775fb50c2b.pdfIn PDF document text
    • http://pefiworawodud.mypressonline.com/68971319005.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425214/normal_601e48d1bd378.pdfIn PDF document text
    • http://sesizuxewewax.mygamesonline.org/the_black_cat_vocabulary_quiz.pdfIn PDF document text
    • http://foripekomufotir.mypressonline.com/2013_dodge_charger_sxt_awd_0-60.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/ca4dae7d-b2ce-49f3-8486-da87ccb61f70/37428928436.pdfIn PDF document text
    • https://feedbc21-cb93-402c-9ae2-3476589645d2.filesusr.com/ugd/f3ecbe_c167e16589144625bfabe0061b567b2a.pdf?index=trueIn PDF document text
    • http://kufawabizoz.rf.gd/81896974544.pdfIn PDF document text
    • https://1e438cd7-6f3b-42ac-a97b-d13a75fa135b.filesusr.com/ugd/0c268c_769036539bac43b08f0b256ebca916e3.pdf?index=trueIn PDF document text
    • https://901c4554-6fda-40bf-8344-1f1538f5dc06.filesusr.com/ugd/a76634_5ea6bcd3eaa344238ee3f25ff156783e.pdf?index=trueIn PDF document text
    • http://retiziwo.myartsonline.com/fabeverexawumowevuzi.pdfIn PDF document text
    • https://78fa80b2-8629-447b-ad63-53e91e8d4948.filesusr.com/ugd/8f02de_c7f0ed45be3e49a58a7f81e0af9b8d7c.pdf?index=trueIn PDF document text
    • http://noderisaxe.rf.gd/34308723183.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42f5e75c-4476-4e75-aba9-9adc1fbe358f/flir_c2_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8355b85-45dc-4f68-95df-f561c30f30b7/deralonegebofesifanu.pdfIn PDF document text
    • http://rubidolad.epizy.com/pathologie_du_liquide_amniotique.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee79a5e5-a13e-417f-beee-2e40663e2413/66396670075.pdfIn PDF document text
    • http://fopugaxug.rf.gd/bazotogaxoxekunone.pdfIn PDF document text
    • http://manuwakagekewu.onlinewebshop.net/kemitekaziraj.pdfIn PDF document text
    • https://c1cb471f-fc5c-4ef2-b3e1-4d0d0d09d135.filesusr.com/ugd/cc5b41_a9867c707c2a43bcbcb426af89e48302.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011fd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD1 5524 bytes
SHA-256: 527db9723ef00417a528d6574ba11aa656e643029d9e45392f3d3adbdb3c7975
font_01_sfnt_off00013282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13282 12028 bytes
SHA-256: 32e0c07808bbd54374c578bd9e85e880611fa494abe8af69009f7ab25cd3c31b