Malicious PDF — malware analysis report

Static analysis result for SHA-256 178d9b83f4508310…

MALICIOUS

PDF

74.6 KB Created: 2021-03-22 16:17:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 730962c9de4efe10a42337f5b8150736 SHA-1: 6e3b88389e263b4778b6738c7e62d741deef3e16 SHA-256: 178d9b83f450831076890135884075672882bc3b3a749ef7e9818bd7464ad077
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One prominent URL, 'https://nipisod.ru/123?utm_term=song+calma+alan+walker+remix', suggests a lure related to a song remix. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a phishing or trojan distribution attempt. No scripts were extracted, but the PDF structure itself is used to host and distribute links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://nipisod.ru/123?utm_term=song+calma+alan+walker+remix PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459057/normal_5fea314cc91f3.pdfIn PDF document text
    • http://faripofijukevom.mywebcommunity.org/77207194237.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420743/normal_5ff8c9e58755f.pdfIn PDF document text
    • http://maxoranano.sportsontheweb.net/roger_federer_book.pdfIn PDF document text
    • http://dafagaketa.sportsontheweb.net/79335533030.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/bovenotojitowe/words_that_rhyme_with_moonrock.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/45461959078.pdfIn PDF document text
    • https://d2faa26e-66ca-44cd-8f84-883624a71019.filesusr.com/ugd/dbbfd0_83db4e88f0e34c61a206c8e8710d7e28.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lebejos/zajilasikowek.pdfIn PDF document text
    • https://f803bf1b-e1c2-47f6-a41f-c9785c88fbd4.filesusr.com/ugd/bf07b1_b72ea92be235483981f526723ea23e1a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mipizaju/numpy_random_multivariate_normal.pdfIn PDF document text
    • http://nununad.myartsonline.com/bodyweight_exercises_program.pdfIn PDF document text
    • https://d497f082-4895-42de-a72c-038d9367c8a3.filesusr.com/ugd/8e727b_cd762d91c8674829b25ada9be78cc47e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/joxilalepapiferoguvadef.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/bedford_nh_police_report.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/74895705271.pdfIn PDF document text
    • http://fijorolur.myartsonline.com/aflac_short_term_disability.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/north_carolina_revolutionary_war_uniforms.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/4042583768.pdfIn PDF document text
    • https://s3.amazonaws.com/vosimalume/vedaniko.pdfIn PDF document text
    • https://1639490a-f715-481e-9fb1-af38d332269b.filesusr.com/ugd/a59130_e725f5c3383941b2aa22484adb48c4b6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lomuper/solving_systems_of_equations_word_problems_worksheet_algebra_2.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

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEB 5268 bytes
SHA-256: aadbd7220553b3d5ab058169879b73f2d16f9c73df7c94ffcfcb2a579eef9cb6
font_01_sfnt_off0000efdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDB 15320 bytes
SHA-256: fb581e88c7b5b926ebf37b6b5d8b39e6f7cf0ec1044b41a89b0457334a1b79cd

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