Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbb61e712f819bf4…

MALICIOUS

PDF

79.5 KB Created: 2021-02-20 06:10:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e3ec193eff2f71cdda303817d909044b SHA-1: 0ee5730b3547cd86ca89ee452a32d9c4bfbbce1c SHA-256: dbb61e712f819bf4e5b4530e43c7298c7284d4c8c8b606720aaa8a3131e80a8f
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'jacksth.ru', suggesting a redirection to a malicious site. The document body, though heavily obfuscated, appears to be a lure related to song lyrics, designed to trick users into clicking the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • 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://jacksth.ru/wb?keyword=lirik%20lagu%20hello%20adele%20dan%20terjemahannya PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4484812/normal_600ca25c8b111.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375073/normal_5fefcbc62596c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393359/normal_60151fbe18c62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421330/normal_5fe9a89c61cdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482619/normal_601aae9b17afd.pdfIn PDF document text
    • http://diwejibazetar.iblogger.org/tubemate_video_er_latest_version_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419424/normal_5fef7184cbd5f.pdfIn PDF document text
    • http://fanuvowebutil.22web.org/akinator_black_award_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418199/normal_600d0e6463f43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450428/normal_6001d71ee7d93.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413362/normal_5fddcd4123eb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476757/normal_5fdacc3f602f8.pdfIn PDF document text
    • http://vidoroxujo.22web.org/ketapubejabuxo.pdfIn PDF document text
    • http://nugidaga.22web.org/moweli.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390350/normal_5fe4a12a0bc0d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://rusakarazixano.epizy.com/kodozuzexojokolewal.pdfIn PDF document text
    • http://juruzozesema.epizy.com/68906361719.pdfIn PDF document text
    • http://xebowuruno.epizy.com/jexamamarirolepofen.pdfIn PDF document text
    • http://pobiludorigogok.epizy.com/why_were_salons_important_to_the_enlightenment.pdfIn PDF document text
    • http://rewerikipij.rf.gd/pegapariludiwowakeb.pdfIn PDF document text
    • http://rosipev.rf.gd/14456657825.pdfIn PDF document text
    • http://bewexipobafuza.rf.gd/friedrich_nietzsche_-_on_truth_and_lies_in_a_nonmoral_sense_summary.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://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC3 5244 bytes
SHA-256: 33c5689da98d7246b6313fae257703095b2766021c1bc9a714fa4116268f0b19
font_01_sfnt_off0000fd74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD74 6124 bytes
SHA-256: b388dbe1581020506c7ae236760a4eb831b5776da7a7f06160d2be54530fa78e
font_02_sfnt_off00010d5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5C 10040 bytes
SHA-256: 9fb96ddb3a5995350ba756f9808a54ffce00cf855717629fa05f2af41c787a18

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