Malicious PDF — malware analysis report

Static analysis result for SHA-256 d06be7216cb52c26…

MALICIOUS

PDF

83.0 KB Created: 2021-01-29 09:56:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3acde1315e69ed4fdad4ed1c6ca24637 SHA-1: 9920815940390f091d678c25adabeaedf14ed7da SHA-256: d06be7216cb52c2669ca34e7963a6bf8e5e1fc25daeb32af41f2a8955b673868
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. The document body, though heavily obfuscated, suggests a lure related to an 'electric guitar beginner buying guide'. The presence of many external URLs, including one flagged as potentially malicious, indicates an attempt to redirect users to malicious or spam content. No scripts were extracted, but the PDF structure and heuristics strongly suggest a phishing or SEO spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/aws?utm_term=electric+guitar+beginner+buying+guide PDF link annotation
    • https://piborubaladedos.weebly.com/uploads/1/3/4/7/134764427/d3ed0139f9ff7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459641/normal_6010c6378d409.pdfIn PDF document text
    • http://onlinetyz.xyz/racer_underground_game_mod_apk_downloadrmrtz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404520/normal_600415b524a25.pdfIn PDF document text
    • https://duvugegigoga.weebly.com/uploads/1/3/1/4/131409055/godoviminowo.pdfIn PDF document text
    • http://particulieres-societegenerale.best/sozalarazukakasuriteki5x764.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414701/normal_5fda2774c33d2.pdfIn PDF document text
    • https://zojubexetiw.weebly.com/uploads/1/3/5/3/135316795/buzolebonax.pdfIn PDF document text
    • http://brumbum3.xyz/xakozizok5ctd8.pdfIn PDF document text
    • https://pewituzusab.weebly.com/uploads/1/3/0/8/130874049/cdf62f15ee1f86.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503987/normal_5fe58c6be2fff.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/waxegatulo/35634083176.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/luzegekutavusabiw.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/52683042081.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/butterfly_effect_full_hd_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/keruwej.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/ol_dirty_bastard_got_your_money.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/77505982523.pdfIn PDF document text
    • http://xigufogadenake.epizy.com/muwebirabozinejivu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D4 4900 bytes
SHA-256: ff6c3a8ab2406c704dfb1f063f7220e37c7a15fdd3db8efbea38298803f5e9b4
font_01_sfnt_off00010a8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8B 11308 bytes
SHA-256: bde51ee26dd25c30731c49de8a0ad30ec9df218eda2731c78960228067ccc208
font_02_sfnt_off000130ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130AC 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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