Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ca37a07dd1e4d25…

MALICIOUS

PDF

82.4 KB Created: 2021-02-22 13:12:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 5bb6086b51f254c594a97462446f5189 SHA-1: 9a30a55c1d554ba9f38677f6e702800070fae2cf SHA-256: 4ca37a07dd1e4d257fa6f1c7e08b4fa574e7bcff1d738586ae73c9ba041b054b
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'jottigo.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the embedded URL uses a popular TV series title as a lure. While no scripts were explicitly extracted, the presence of external URIs and the nature of the detection suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/strik?utm_term=la+catedral+del+mar+2.sezon+ne+zaman PDF link annotation
    • http://watomidipokaki.22web.org/ap_world_history_modern_textbook_answers.pdfIn PDF document text
    • http://pumujavebedopa.iblogger.org/dibexejofekifu.pdfIn PDF document text
    • https://cdn.sqhk.co/kafexobesa/igjhc5t/guess_the_anime_quizzes.pdfIn PDF document text
    • http://gadifurewurol.22web.org/mdm_bypass_tool_2._0.pdfIn PDF document text
    • https://cdn.sqhk.co/xaselavub/gjDP0rV/kagepazetatositomika.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/tapelu/pulmonary_embolism_treatment_guidelines_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/77875575577.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/77247029065.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/bartender_2016_cracked.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/72469871102.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/kavach_argala_kilak.pdfIn PDF document text
    • http://jimanujomubil.epizy.com/aafp_isfm_feline_friendly_handling_guidelines.pdfIn PDF document text
    • http://zumewozuzetarun.epizy.com/zuvodonefojonemeju.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/50016989392.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D9 6440 bytes
SHA-256: 3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a
font_01_sfnt_off000101cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CD 5240 bytes
SHA-256: 978c2adf31f9dc921017089c3c663159d58101582c1120594123c5e24c2af8d2
font_02_sfnt_off00011392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11392 12232 bytes
SHA-256: a2cdf290e50f3c0a59f13fa7d23953c983d85405c43dbfe1d0be11c0c51c9e59

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