Malicious PDF — malware analysis report

Static analysis result for SHA-256 c41a4fc522abc4ae…

MALICIOUS

PDF

84.9 KB Created: 2021-03-17 04:22:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6017995c865042a74d0f55587e0e8c81 SHA-1: 53bb74b4432306819bbaf24263af5439fcebb510 SHA-256: c41a4fc522abc4aebdc425c2e8cde94fa746a4d5b2b8b77f8ec404e387cc3b37
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crophysi.ru/wix?keyword=osrs+sarachnis+range+guide PDF link annotation
    • https://xumogimunosu.weebly.com/uploads/1/3/1/6/131607683/lixojosidakinomav.pdfIn PDF document text
    • https://wopadutizibum.weebly.com/uploads/1/3/4/3/134306931/8105939.pdfIn PDF document text
    • https://pidowiwosuzaji.weebly.com/uploads/1/3/0/9/130969191/tesudoxaw_zasaw.pdfIn PDF document text
    • http://idealica-tufficiale.website/is_a_2004_ford_focus_a_good_car8o8m5.pdfIn PDF document text
    • https://mawosamaretezij.weebly.com/uploads/1/3/4/8/134860838/magupapetako.pdfIn PDF document text
    • http://buyervannakupitvsem.xyz/what_indian_foods_are_gluten_free0ntfi.pdfIn PDF document text
    • http://ninavadilu.22web.org/english_language_teaching_techniques.pdfIn PDF document text
    • http://zuxotit.iblogger.org/gre_synonyms_and_antonyms_list_free_download.pdfIn PDF document text
    • http://new-leggins.site/928833540124bpg3.pdfIn PDF document text
    • https://tufubigin.weebly.com/uploads/1/3/1/4/131453284/nimojusuvavibep.pdfIn PDF document text
    • https://digexuvin.weebly.com/uploads/1/3/2/8/132814990/gesoge_nexikamivoj_femepadurisepuj.pdfIn PDF document text
    • http://pifumufupes.iblogger.org/12729626342.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/rodiligarexo/45337185693.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/bimadilezikifumog.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/ipcc_full_report.pdfIn PDF document text
    • http://feletik.epizy.com/53726918222.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/xezulamefubadijudovopuse.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/balance_of_payment_book.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/difiraxisedopolafexeb.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/uninformed_search_algorithms_in_artificial_intelligence.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/bilibili._tv_video.pdfIn PDF document text
    • http://metotosebofetu.epizy.com/beechcraft_king_air_200_poh.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ECE 5196 bytes
SHA-256: 523f8ee46e4f2848369beecdd27e3b695226fbe2459767cfc13e43dba91162f4
font_01_sfnt_off00012069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12069 10924 bytes
SHA-256: 0acb23416966c79d2fecacc64c1b6b731d875654ccb1715060f39e5c300cf4ee

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