Malicious PDF — malware analysis report

Static analysis result for SHA-256 67dbc22a8497ad36…

MALICIOUS

PDF

88.3 KB Created: 2021-04-05 12:45:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: a49c8b6e915949bb17d81d19b7d53128 SHA-1: e93fc037574d15f1539a5979fa994a3d27cd029b SHA-256: 67dbc22a8497ad36b3aab03b35182b4adcc0b9a6f34e047c3e0937758432b75c
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are flagged as malicious or part of a link farm. The document body, though heavily obfuscated, suggests a lure related to the Quran, which is likely a pretext to disguise the malicious intent of redirecting users to potentially harmful sites. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious document designed for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://crophysi.ru/123?utm_term=al+quran+30+juz+dan+artinya In PDF document text
    • https://zomafada.weebly.com/uploads/1/3/4/7/134772300/segesale-relidikoboraga-pikukawumageba-kofivedoxesid.pdfIn PDF document text
    • http://dasazopemobor.mywebcommunity.org/mozefixojilarenekob.pdfIn PDF document text
    • http://discount50it.pro/pumawawodclcwc.pdfIn PDF document text
    • http://douchehq.xyz/28750218588vqdof.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/altec_lansing_lifejacket_xl_bluetooth_speaker_black.pdfIn PDF document text
    • http://bevodofad.iblogger.org/vaselejevukafebiw.pdfIn PDF document text
    • https://panikelixiguju.weebly.com/uploads/1/3/4/4/134478359/xoburaxogo.pdfIn PDF document text
    • https://wovitinukid.weebly.com/uploads/1/3/4/3/134372120/pitoginosafo_jujozameb.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/dekogamik/jorat.pdfIn PDF document text
    • http://benamow.myartsonline.com/pokojomamodaxinad.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/89628216177.pdfIn PDF document text
    • https://s3.amazonaws.com/popisiburewixuj/free_org_chart_template_in_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/91212318749.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/camscanner_free_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/tugafebip/how_would_the_stimulus_check_show_up_on_bank_statement.pdfIn PDF document text
    • http://rizizevifixelu.epizy.com/sidajolaf.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/89591664932.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011ea6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11EA6 28836 bytes
SHA-256: 2625966706203c70575090229b4209999fc27f6f056f02fca291758364bc93be
font_00_sfnt_off0000e866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE866 5292 bytes
SHA-256: 07a3c02e44030809d3b682a6c0364cb8c1d0ad0db4a1c08cdbb492eec300be59
font_01_sfnt_off0000fa87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA87 10580 bytes
SHA-256: bfbf50bb1dc05dfa629c0408a1bec78fc64edaa0014a4342c5b49dff4e84dcea

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