Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1ab96f60781370a…

MALICIOUS

PDF

83.5 KB Created: 2021-03-11 04:33:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: aedcc1bb7e70cbf823282541692b5eb9 SHA-1: 2ab67191130e7714b0fa6f153db7dc7a00079c38 SHA-256: a1ab96f60781370ab82a4b47500c718793ca00253df9aa9cae84923c92f7b318
244 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable hosting or known redirectors, suggesting a link farm designed to distribute malware or phish users. The primary redirector URL is `https://dafemum.ru/wix?keyword=pandora+one+apk+mod+v7.3+free+download`, which attempts to trick users into downloading a modified application. ClamAV and ML classifiers also flagged this PDF as malicious, reinforcing the phishing and trojan threat.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=pandora+one+apk+mod+v7.3+free+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4473415/normal_603a063e35d43.pdfIn PDF document text
    • https://kuxijixa.weebly.com/uploads/1/3/4/8/134856984/7474642.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450630/normal_5fdb38b513fb6.pdfIn PDF document text
    • http://the-job.ru/filter_sort_kara_denge_video3jr2z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416125/normal_5fd392d1d20ce.pdfIn PDF document text
    • http://xploitcrew.io/52363489105ycji3.pdfIn PDF document text
    • https://revunisukigi.weebly.com/uploads/1/3/4/8/134849871/7c551ecd76e4ad.pdfIn PDF document text
    • https://pukogapuwobar.weebly.com/uploads/1/3/4/3/134307851/losijowo.pdfIn PDF document text
    • http://social-whisper.ru/481514907045fts4.pdfIn PDF document text
    • http://jusapp.club/67253120727w8nxb.pdfIn PDF document text
    • https://sofirutowik.weebly.com/uploads/1/3/1/3/131381411/jupugukekaxi-laxenibiwen-zipagakadunov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501993/normal_600727912fc80.pdfIn PDF document text
    • http://vozujuluxe.iblogger.org/widopolipivajip.pdfIn PDF document text
    • https://jupoxoguji.weebly.com/uploads/1/3/4/0/134097256/nososetigogewofavozi.pdfIn PDF document text
    • https://sutovuwoti.weebly.com/uploads/1/3/0/9/130968995/farozedibalawu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424637/normal_5fcb102185b9d.pdfIn PDF document text
    • https://wavujosivisero.weebly.com/uploads/1/3/2/7/132740585/foralesuban.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/0df65c19-6674-48f7-be67-01752d98d782/the_metabolism_reset_diet_reviews.pdfIn PDF document text
    • http://vozotokunu.rf.gd/tamil_movies_hollywood_2017.pdfIn PDF document text
    • http://tilukonera.rf.gd/chrome_old_version_ubuntu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ca7cf6f-e9ea-4030-b4fb-970f64043b3b/10224312138.pdfIn PDF document text
    • http://ratotepuno.rf.gd/rumezisaletajudirinineb.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AF 5500 bytes
SHA-256: 42872a9c857a8b13239cffcc681c957637cb90bd92d5bc32c33a05783fe1db1b
font_01_sfnt_off0001077e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1077E 10412 bytes
SHA-256: 6d66a3e7b99ec67e34ba25f6e097ed62152d24c177ee0557c07a36b11b7ed94f
font_02_sfnt_off00012b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B6F 16088 bytes
SHA-256: 55ee31f2b9c575572aca401957c5cf2f3b57b55b1dd57d1bb6d1e144d3512b41