Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce954947b1aaee73…

MALICIOUS

PDF

76.4 KB Created: 2021-03-09 01:40:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 022ce232d9fe513c3e9c0b2ef380c783 SHA-1: 08e482e8ed4c5e9c199cf7021da6c4c6d2c62470 SHA-256: ce954947b1aaee73436876b6635d847b815c723d18c18b2d768ad90d1658bbfc
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO spam or phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded URLs, such as 'https://maypoin.ru/wix?keyword=tabla+periodica+metales+y+no+metales+gases+nobles', are likely used to redirect users to malicious sites.

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://maypoin.ru/wix?keyword=tabla+periodica+metales+y+no+metales+gases+nobles PDF link annotation
    • http://guworumitikizu.iblogger.org/44056849116.pdfIn PDF document text
    • http://silafakujo.22web.org/designated_survivor_season_1_episode_11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467581/normal_603e15df1d14f.pdfIn PDF document text
    • https://gitosupogule.weebly.com/uploads/1/3/2/7/132741155/kusemog-luwigovuvedeb-jumuw-nujiloka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474977/normal_603e5df29f715.pdfIn PDF document text
    • http://xivitej.66ghz.com/how_do_you_define_heavy_rain_in_a_story.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417305/normal_602c8373ec167.pdfIn PDF document text
    • https://xavimunemu.weebly.com/uploads/1/3/2/8/132815343/varezudufewedur_tabemakukurarix.pdfIn PDF document text
    • http://gisonanezoboru.iblogger.org/32255975943.pdfIn PDF document text
    • http://xufuxenu.mypressonline.com/dmv_drivers_handbook_2020_audio.pdfIn PDF document text
    • http://resipowepo.getenjoyment.net/97588001175.pdfIn PDF document text
    • http://kovemiwixipogaf.66ghz.com/norcold_fridge_codes_n.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
    • http://mukanebesiva.atwebpages.com/22902298968.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/guided_reading_kindergarten_lesson_plan_template.pdfIn PDF document text
    • http://mukanebesiva.atwebpages.com/best_place_to_see_saguaro_cactus_near_phoenix.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/43845465665.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/fajosegu.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/fubuseresox.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_off0000dddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDB 5372 bytes
SHA-256: 87d2196d4a74a83cb771985191717fbfcfa219af3c4a4851d801590fca308497
font_01_sfnt_off0000f003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF003 11148 bytes
SHA-256: 4f1b0e918566035b48c9d8d734adea6b39b0d8b21162320c7d98ffbb6a4d2527
font_02_sfnt_off0001147d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1147D 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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