Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb9a220fb2e57af6…

MALICIOUS

PDF

74.4 KB Created: 2021-03-20 02:20:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 9dd87455ad47f970046738390a475b89 SHA-1: 07d8aec98200ecacbe30abdb041b11284cfe1590 SHA-256: bb9a220fb2e57af6fd8a1086685bf1a286f64d726032645548ff839c5b3fe50f
214 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains a large number of embedded links, many of which point to redirector infrastructure, suggesting a phishing or scam campaign. The primary malicious URL identified is dafemum.ru, which is used in conjunction with a keyword that mimics a search query to potentially deceive users into clicking.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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=index+of+tv+shows+in+hindi In PDF document text
    • https://fazugiwe.weebly.com/uploads/1/3/4/0/134012697/kavon.pdfIn PDF document text
    • https://biwakegexenulu.weebly.com/uploads/1/3/4/4/134437141/janegazuwikuwuv_zeroranisejase_xogixuzaxoviba_bivebijapami.pdfIn PDF document text
    • https://vuporevebupo.weebly.com/uploads/1/3/0/8/130873771/giwosasivovedoka.pdfIn PDF document text
    • https://xedububedopo.weebly.com/uploads/1/3/0/7/130740082/kanosapo.pdfIn PDF document text
    • https://raxabebawozovi.weebly.com/uploads/1/3/4/3/134311701/malakotamuxi-vipif.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/8d7cbb28-726a-4e06-89fd-6d6e43c444a4/xedanizowudefosusat.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/the_ct_scanner_reading_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/big_green_egg_table_dimensions.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/gawufuwewewoxufaziwaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45c6f1dd-5a5c-47d4-a917-5648741686cb/jukesejepozef.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/rorivoverufojamoxuxigaved.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/bafewufixekisiv.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/xudadivumagojajuvovi.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/28876253531.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/92932942083.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/what_do_red_spider_lilies_represent.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/the_red_pyramid_characters_pictures.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_off0000e8a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A9 4812 bytes
SHA-256: 5b5a0493a45c09d50edc73fece9a0d3c5db0bf5bde18989327dd4f826035a0cf
font_01_sfnt_off0000f92a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92A 10500 bytes
SHA-256: fb11c70c6f426d1f4ff2c99cc9d6f33fd333350348ec3ded70a743786b2ed264

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