Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb877e4c6ca35b96…

MALICIOUS

PDF

86.6 KB Created: 2021-06-04 13:31:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 89a78940971151ea71ebb084691bf9e8 SHA-1: 0d0cf5a226bc5f20762edea03ec2b22bb1625344 SHA-256: bb877e4c6ca35b96e57982ace272c2cb3a39c0d7aa64172841b4b43a170952af
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded document body, though heavily obfuscated, contains references to 'lego marvel super heroes 2 wakanda bug' and 'wkhtmltopdf', which may be part of a lure or obfuscation technique. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • 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://philabc.ru/pbw?utm_term=lego+marvel+super+heroes+2+wakanda+bug PDF link annotation
    • https://tagorawijetix.weebly.com/uploads/1/3/5/3/135392874/vifafa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487187/normal_601df3f12c71f.pdfIn PDF document text
    • https://duzajitoji.weebly.com/uploads/1/3/2/6/132680922/bccb844d91772fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485165/normal_6036b85e99f44.pdfIn PDF document text
    • https://rituzanasalu.weebly.com/uploads/1/3/4/7/134718781/jikefoxu.pdfIn PDF document text
    • https://zogiwabut.weebly.com/uploads/1/3/4/3/134364715/383d8fd4.pdfIn PDF document text
    • https://xikobidena.weebly.com/uploads/1/3/6/0/136097244/xomowu-degedesu-kemejeji.pdfIn PDF document text
    • https://rediwikutine.weebly.com/uploads/1/3/4/0/134096605/d919c005c41.pdfIn PDF document text
    • https://foroziroxodom.weebly.com/uploads/1/3/4/6/134647192/fe243201c12f04.pdfIn PDF document text
    • https://mefupawex.weebly.com/uploads/1/3/4/3/134317460/wafalogujiwewonab.pdfIn PDF document text
    • https://bujefodamefizup.weebly.com/uploads/1/3/1/0/131070612/dcda33fd8adcb2.pdfIn PDF document text
    • https://vomujozirokino.weebly.com/uploads/1/3/4/3/134318601/548ffc.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/e22d24d2-843d-43c9-97df-5c5bcca6d5ec/japanomudevimebolefu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc641500-2f22-4506-a2b9-706818f24303/tropic_of_cancer_henry_miller_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fbb7b59-ef8a-4b02-80b6-23e8d9966b58/84604210177.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95143e2f-9603-4e67-88d4-6bf6785bc019/que_es_la_estructura_organizativa_de_una_empresa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2b1d838-db59-434b-b2e3-aa26d89ba284/43146155245.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5689525a-b394-4936-98cf-25090fee6c1b/50645379943.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a14ae07a-2ae7-466b-bfc5-d9921b6aa5dd/firaxarojikepil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec9ac745-8f68-4645-b7d1-7c0205a90bea/subofiwizuvawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d503f35f-3f1f-4fa2-8410-a7225603821a/how_to_on_lenovo_keyboard_light.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b3ebfad-60b5-45f7-a174-6bfaadd7816b/m-audio_fasttrack_pro_price_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2481a348-14e9-4416-ae7a-eb8671060b15/25401965321.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bd97959-17a2-44d6-9c49-9f561a66d7ee/best_keto_instant_pot_recipes_reddit.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_off00010e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E56 5804 bytes
SHA-256: 4604059e6b17aff3a573fe4526ab82a9cc51858b86faa1fb75bd0d0a1259d9ac
font_01_sfnt_off000121fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121FE 13256 bytes
SHA-256: e0b99a88391fc552cd8bd5748c496c3d496b9a9103152cdf58c34abe3b30334f

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