Malicious PDF — malware analysis report

Static analysis result for SHA-256 de3ac616f95a8544…

MALICIOUS

PDF

78.1 KB Created: 2021-03-07 07:43:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 2ed71d0442307f75ddf54f527126144d SHA-1: 6f4704b896a7251fef34c9170bfd4f4794548275 SHA-256: de3ac616f95a85443bf3b28c2d7a5cee725005eb274bd1923067ba4113a7bafb
176 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or distributing malware. The 'SE_CALLBACK_LURE' heuristic suggests a phishing context, potentially related to fake billing or support scams. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence indicate malicious intent, likely to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://golowaki.ru/aws?utm_term=how+to+use+jitterbug PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450440/normal_5fcbfaeded933.pdfIn PDF document text
    • http://warixedivukinat.mygamesonline.org/42326984361.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454171/normal_600ed7feec651.pdfIn PDF document text
    • http://femokotafi.66ghz.com/hark_the_herald_angels_sing_sheet.pdfIn PDF document text
    • http://kuzexamipapoxip.medianewsonline.com/dumajazivana.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/tobovunoberiki/71502413668.pdfIn PDF document text
    • https://0f926834-650c-4d5a-b53c-ad60ae412ccc.filesusr.com/ugd/6a44d8_d634a1f22eaf4807830153e5fbb24ee5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kumasala/fatozezovijiku.pdfIn PDF document text
    • https://5e0c4d4d-41f9-428c-9564-b93e7cff6769.filesusr.com/ugd/510691_55d808611f234697a70d8d1cf1de8165.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/catalogo_movistar_2018.pdfIn PDF document text
    • https://37976aa0-f55f-47d3-847a-8d185b13ebf6.filesusr.com/ugd/1d6212_562c1396e4494d0bb5fc0be408182cad.pdf?index=trueIn PDF document text
    • http://nixomirorubu.myartsonline.com/ge_hydrowave_washer_wont_drain_and_spin.pdfIn PDF document text
    • http://jikafazasakojob.epizy.com/alesis_dm10_pro_kit_electronic_drum_set.pdfIn PDF document text
    • https://153f2bed-3501-4ec5-9468-ed1987511f6d.filesusr.com/ugd/f67134_54c849cacb684a2cb616616180360040.pdf?index=trueIn PDF document text
    • http://nowimirozox.atwebpages.com/wedogivegebosuzadapor.pdfIn PDF document text
    • http://vekimawo.rf.gd/h_r_block_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/tosax.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/nadhom_asmaul_husna_arab_dan_latin.pdfIn PDF document text
    • https://2acf176d-1645-44e4-83be-c67f7ac9af6b.filesusr.com/ugd/e72dd6_8d62bf2bd3be451aab2450d84dd3178d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/2000_chevy_blazer_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/how_to_clean_fisher_and_paykel_dish_drawer.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/18092870973.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_off0000f3be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BE 4880 bytes
SHA-256: 5451265d587d1a98e1276b5356cbe0e9151e468ec4d888de483a8c2df0c8edf1
font_01_sfnt_off0001047f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047F 11836 bytes
SHA-256: 794a833f3a6adc0735fc5efd63f271323aef08b2658b619fba22e01a2e6c9f2a

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