Malicious PDF — malware analysis report

Static analysis result for SHA-256 86515175dc9c4efb…

MALICIOUS

PDF

77.2 KB Created: 2021-03-14 05:20:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 03096d26dc1aa5d919e2743e051e32bc SHA-1: 7e82b908ab452df69bdd418cf97b4aeb9de730e1 SHA-256: 86515175dc9c4efbb433ce0fc86fe4f69216483f53564f8e5a88b89f17620a85
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are likely part of a link farm designed to distribute malware or facilitate phishing. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious sites, potentially for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://fokemale.ru/123?utm_term=fishing+planet+level+15+guide PDF link annotation
    • http://krym.today/fuxetedabobizvwqn.pdfIn PDF document text
    • http://zopokujejisolan.getenjoyment.net/vocabulary_workshop_level_b_unit_5_synonyms_and_antonyms_answers.pdfIn PDF document text
    • https://vopusufibos.weebly.com/uploads/1/3/4/7/134731751/2776959.pdfIn PDF document text
    • https://voxalasodakuro.weebly.com/uploads/1/3/4/0/134042561/jaxavomeguru.pdfIn PDF document text
    • https://lidubudizut.weebly.com/uploads/1/3/2/8/132815063/f4cc671e3.pdfIn PDF document text
    • http://medtechnika1.ru/judexufezowezedaz37ss.pdfIn PDF document text
    • https://furiraduwonejos.weebly.com/uploads/1/3/4/8/134870793/bujuk_kegorasudila_wejawuroxe_fifagob.pdfIn PDF document text
    • http://wuxetij.mypressonline.com/how_do_you_find_your_gpa_on_infinite_campus_student.pdfIn PDF document text
    • https://fogojokiverowur.weebly.com/uploads/1/3/0/9/130969702/ninewo-katowavelovitix.pdfIn PDF document text
    • https://batuginuvitewaw.weebly.com/uploads/1/3/4/0/134013132/tabakokabanuga.pdfIn PDF document text
    • https://fetezubusob.weebly.com/uploads/1/3/2/6/132681625/rojivov_xabetodag.pdfIn PDF document text
    • https://ferofetilusef.weebly.com/uploads/1/3/5/3/135346026/jelizefokipur-muwojoli-pusibinofa.pdfIn PDF document text
    • http://makedctl.site/70737348760b5smo.pdfIn PDF document text
    • https://lifexusubanipi.weebly.com/uploads/1/3/4/3/134377686/1874295.pdfIn PDF document text
    • http://avlto.best/60663465314hynch.pdfIn PDF document text
    • http://kefijor.mygamesonline.org/24705347322.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/nokiva/xusesowokekebuke.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/biruxa.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/42080113884.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/bhp_full_form_in_electrical.pdfIn PDF document text
    • http://jeborawaleko.atwebpages.com/read_theory_analogies_3_level_8_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/what_do_you_call_a_visual_learner.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_off0000f0d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D1 5316 bytes
SHA-256: ec07e95efcb802fb7eca9f88f517fcc924f3bbf3e0645f20dc3ec87de6784945
font_01_sfnt_off000102f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F9 10960 bytes
SHA-256: c7646b0cb18a9da1367f367fb3aeeb41a455301fdbca0dbeb104f27183407d64

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