Malicious PDF — malware analysis report

Static analysis result for SHA-256 19380701a29192a4…

MALICIOUS

PDF

66.2 KB Created: 2020-11-21 15:59:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a7846bae9cf40c3afe9c70a9fd6f05c2 SHA-1: 77a1e95e3b67813dd68f827beb145d206d3c5591 SHA-256: 19380701a29192a4a1b136a6c7b5466aa202243fd36745ea09f16334fe89d3a2
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, as indicated by the 'PDF_SEO_LINK_FARM' heuristic, suggesting a phishing or malicious redirection attempt. The presence of an embedded URL and the ClamAV detection further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing lure, likely delivered via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://trafficel.ru/123?utm_term=the+ffa+creed+paragraph+1 PDF link annotation
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/0c18874847f.pdfIn PDF document text
    • https://biwireteput.weebly.com/uploads/1/3/4/1/134131636/4385146.pdfIn PDF document text
    • https://xinotojopafexiz.weebly.com/uploads/1/3/4/3/134316842/52803.pdfIn PDF document text
    • https://kesizizuju.weebly.com/uploads/1/3/4/3/134384541/6034612.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/wovitiku/pexajidizota.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/gegojojolofobis.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/janadotidixuda.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/define_organisational_behaviour.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/bengali_movie_mkv_skymovies.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/master_guide_publications_grade_11.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/opinion_statement_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/how_to_add_adobe_tab_in_outlook_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/62347224851.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/29082897654.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/chasing_cars_snow_patrol_song.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/showbox_download_apk_android.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_off0000c736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC736 5208 bytes
SHA-256: 16aa55b01e6eb19cfbb6efcb87e7344def03eaa2e2e794cd6133f97a11ef3b4f
font_01_sfnt_off0000d8ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EE 10296 bytes
SHA-256: 8e53b04c7c3157319bddc7525a79f6508f62fe8b1b0f00f3fcec4a67c4dc1fcb

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