Malicious PDF — malware analysis report

Static analysis result for SHA-256 b139e799e7f6c5c6…

MALICIOUS

PDF

81.3 KB Created: 2021-04-06 01:15:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 83f30785428cfbe05acc564c0b4b9693 SHA-1: 11c7024b8c356ed3081103e0f4552739678c2905 SHA-256: b139e799e7f6c5c6071d8aef25544a1470ac30b7444abf70df914cd4e2e956f2
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dugedepap.ru/123?utm_term=sophisticated+investor+certificate+form PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4385415/normal_5fe38fe0d8634.pdfIn PDF document text
    • https://dowusezawidi.weebly.com/uploads/1/3/3/9/133997386/4188089.pdfIn PDF document text
    • http://zuzotolifewujex.22web.org/smart_couples_finish_rich_david_bach.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418970/normal_603afb4ac3b3e.pdfIn PDF document text
    • https://vezerovir.weebly.com/uploads/1/3/4/5/134580053/ea88550a748f.pdfIn PDF document text
    • https://wugepugozufov.weebly.com/uploads/1/3/4/7/134744675/dodeb.pdfIn PDF document text
    • https://gunobapeve.weebly.com/uploads/1/3/4/7/134706327/4b08dcb4ff9dc.pdfIn PDF document text
    • https://penoruzeni.weebly.com/uploads/1/3/4/1/134132400/pawak.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/how_to_install_adobe_flash_player_in_chrome_android.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ba789de2-c385-43ee-b32d-a34c698d1993.filesusr.com/ugd/b7082a_821fbbf084a646ff80198e973e97e936.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/feralomafarepejut.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/69438129389.pdfIn PDF document text
    • https://7be8961d-effb-4c78-a255-78c3c9f0be09.filesusr.com/ugd/3dd68e_b696c7073ea4412e9097b2a9d6fa5f58.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/pdf_converter_to_jpg_software.pdfIn PDF document text
    • http://miganuvag.myartsonline.com/air_brake_test_procedure.pdfIn PDF document text
    • https://e46eb8ae-11b5-47af-91b5-79e2db369635.filesusr.com/ugd/f84671_2c8be8a6290e4c398dda9d9379b7b983.pdf?index=trueIn PDF document text
    • http://zugawixiwo.rf.gd/is_dmv_open_in_schenectady_ny.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/36430650729.pdfIn PDF document text
    • https://f07eb630-23ff-4298-a1df-d7940f1ba2dc.filesusr.com/ugd/097a5b_8240158d91474ce4bc93e4c9190861e9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/guided_media_javatpoint.pdfIn PDF document text
    • http://jigemoli.epizy.com/dewibir.pdfIn PDF document text
    • http://livagutavox.epizy.com/97448677192.pdfIn PDF document text
    • http://timusirekinamiz.rf.gd/oxford_english_grammar_book_for_class_5.pdfIn PDF document text
    • https://30cc9e9c-6145-4029-bfdc-d0561bdb3a10.filesusr.com/ugd/0dcf4b_494d44e965e2424880ca57100b3d8242.pdf?index=trueIn 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_off0000ff30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF30 5528 bytes
SHA-256: af66894dc4bd610e38a97b9c1120ad990f6f665559d62efdc5a57bb77ee00ddd
font_01_sfnt_off000111db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111DB 11136 bytes
SHA-256: 5fee1dfa3e02f932e1de902554b945faa375d04e41e37098e8de6ad4b00a287b

Open this report in the interactive analyzer, or submit your own file for analysis.