Malicious PDF — malware analysis report

Static analysis result for SHA-256 6006e9357add8f5b…

MALICIOUS

PDF

79.7 KB Created: 2021-05-19 09:43:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: bcf66f7c672420bd03b74ff3f5552d25 SHA-1: 7c368940e40b14b95ae35420825698b09bbe6e40 SHA-256: 6006e9357add8f5b08bc9f1296e675ae550e83ab0afc6a959bffe53ce7a63101
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The document body, though partially corrupted, indicates a theme related to social security 1099 forms, likely to entice users to click on the malicious links. The presence of PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics, along with ClamAV detection as Pdf.Phishing.Trojan, strongly indicates a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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/strik?utm_term=how+to+get+your+1099+from+social+security PDF link annotation
    • https://dojufewuwi.weebly.com/uploads/1/3/4/2/134235401/3035337.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387056/normal_606b79ccf400b.pdfIn PDF document text
    • https://jewupoma.weebly.com/uploads/1/3/1/4/131437657/juresasinono_pamobow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453336/normal_601b8927e0e75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495681/normal_604ca1c5bd008.pdfIn PDF document text
    • https://bagerukuvimi.weebly.com/uploads/1/3/2/8/132815916/vobikiripowi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401982/normal_6008bf38d7e6c.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/19da48e8ae27.pdfIn PDF document text
    • https://tagopudul.weebly.com/uploads/1/3/5/3/135392217/8432208.pdfIn PDF document text
    • https://xusudunegowubub.weebly.com/uploads/1/3/0/7/130739081/fakakazavi.pdfIn PDF document text
    • https://lepepapiminokuj.weebly.com/uploads/1/3/4/4/134493398/pezorekusuwarumowo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421959/normal_5fe42a1ea37b7.pdfIn PDF document text
    • https://mafexanilexa.weebly.com/uploads/1/3/0/7/130739060/1685474.pdfIn PDF document text
    • http://zefakelilivaxo.iblogger.org/25399318146.pdfIn PDF document text
    • https://safalijig.weebly.com/uploads/1/3/1/0/131070993/nimepap.pdfIn PDF document text
    • https://vagapirub.weebly.com/uploads/1/3/4/6/134648019/9660182.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://limixumijegaf.epizy.com/quality_analyst_interview_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/32233331663.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/jetenuxazelano.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/xasuloxinorewagokomefada.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/70719398593.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/33172929050.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_off0000f661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF661 5704 bytes
SHA-256: aa9caa366dadc66eff050cc0e24d2fc7abd18c8b52096a7a704ec13def65b7b2
font_01_sfnt_off000109dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109DC 11508 bytes
SHA-256: 8253276f5726d934d6b38117238ec2fdd21df3cc26598ab92c87959e55b9242f