Malicious PDF — malware analysis report

Static analysis result for SHA-256 db7c6624bb8378b3…

MALICIOUS

PDF

72.3 KB Created: 2021-03-22 23:51:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 9bed0b35b6d2f0367915d8632d665174 SHA-1: d8adbe7c5a562bf861ba318112035275d5f6499b SHA-256: db7c6624bb8378b31ed9babbfb07860e94bd0b7e6e4c85335572ea1e2dc7cb5b
156 Risk Score

Malware Insights

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

This PDF document contains numerous external links, a common tactic for SEO link farms and phishing. The primary URL, https://kuzutuzo.ru/wix?keyword=physical+and+chemical+change+lab+6+answers, suggests a lure to a malicious website disguised as a search result. ClamAV and ML classifiers strongly indicate malicious intent, specifically classifying it as a phishing trojan.

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://kuzutuzo.ru/wix?keyword=physical+and+chemical+change+lab+6+answers PDF link annotation
    • http://ziduruwekomowob.iblogger.org/koxafemumalu.pdfIn PDF document text
    • https://petuxomurekag.weebly.com/uploads/1/3/0/8/130874153/zatoxasivanerew.pdfIn PDF document text
    • http://alkim.xyz/xogijof8xes2.pdfIn PDF document text
    • http://kanshoper.site/963556251589owjf.pdfIn PDF document text
    • http://soderenofironev.iblogger.org/4526575152.pdfIn PDF document text
    • https://wuguruxozoza.weebly.com/uploads/1/3/4/0/134040539/4acf412df.pdfIn PDF document text
    • https://musevurimimurom.weebly.com/uploads/1/3/4/7/134711136/2017010.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/vufupu/catia_v6_basic_tutorial.pdfIn PDF document text
    • http://wunikuwikefa.epizy.com/batolugukaw.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/1_month_ectomorph_transformation.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/cheatsheet_markdown.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/my_favourite_things_coltrane_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/schedule_baseline_in_smartsheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64ac0bb0-b20b-4889-a1e0-e6b5cbb20ffd/graco_pack_n_play_bassinet_recall.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/72168876091.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdc54fea-9cd5-4c7f-a286-dd7c6fcbadd2/best_books_on_the_art_of_manipulation.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/tujunanaxozikigiwujuzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d15dcea0-06d2-4af8-8a89-c436ae4f238f/sagifojimafuvasokisiz.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_off0000d075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD075 5440 bytes
SHA-256: 5c33983d1b4286cf09a3b2baba12e4a5d0d4c71652b83533e1dde260d3fdfed7
font_01_sfnt_off0000e2b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B8 10224 bytes
SHA-256: 10e09f2a489a0974f30f56dde412f727299f9123179067c1355ba5141953b6bc
font_02_sfnt_off000105bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BD 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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