Malicious PDF — malware analysis report

Static analysis result for SHA-256 491aebf33ebaeba6…

MALICIOUS

PDF

81.0 KB Created: 2021-05-23 03:57:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 35c806b7b90b7fd4d6ec61f90f803b9b SHA-1: 560850042e4f5bbc2504bc30b922fd1f146c3ef2 SHA-256: 491aebf33ebaeba67629670c360db12a701e87368fe825b5d7c69ae7d09b0f76
116 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains an embedded URL that leads to a suspicious domain, likely intended to redirect the user to a malicious site. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest an attempt to exploit user interaction, possibly through a link or a QR code lure, to achieve a malicious outcome such as phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://druttle.ru/strik?utm_term=how+much+does+ups+charge+for+printing PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381340/normal_604db1c14e2d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377642/normal_6024c2338b32d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426541/normal_5ff4d6884c740.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459036/normal_5fe5cfcb8fbce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470836/normal_60108c8652bc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404113/normal_60337eef17642.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419430/normal_60212d92d0f73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473890/normal_60332426835ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449395/normal_6007a69d8c484.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390996/normal_600e4c53585ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365540/normal_6043edfe5d542.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448115/normal_605f920509f9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501503/normal_605efd6856b54.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/jajuzasalikirut/34294944976.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/gipiwokisosiwu.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/75599367666.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/ronupevefikobisevuz.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/wopezu.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/3283696156.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/96412999767.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/likeminujuniwane.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/majokuzamabamikativub.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/3343533227.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/how_much_to_service_a_gas_fireplace.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_off0000fca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA2 5588 bytes
SHA-256: 616425e188a9eb73956afb18051a5f7ccb61f676f8fd7cb510cb217b29c84345
font_01_sfnt_off00010f8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F8C 11500 bytes
SHA-256: 9c2265378afde52f8214907f854e794c085955d6959c5d291e3bcec1ff9a1e2e

Open this report in the interactive analyzer, or submit your own file for analysis.