Malicious PDF — malware analysis report

Static analysis result for SHA-256 e17a935259980d51…

MALICIOUS

PDF

68.7 KB Created: 2021-05-21 21:45:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d973ae1a39ebddc749eaa81bd76a5cb8 SHA-1: 9c525245f9a24483ca36e170aabe6ce8141b5500 SHA-256: e17a935259980d519122b43671a7f459b2a5b88f9dd0be400eae57f523f6df8b
212 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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8294

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=el+ser+uno+audiolibros+cosmo+alma In PDF document text
    • https://saguwaxofules.weebly.com/uploads/1/3/2/6/132681351/lalugaj.pdfIn PDF document text
    • https://xezixopizanew.weebly.com/uploads/1/3/5/3/135314636/vifenenil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490140/normal_6055f822dd98e.pdfIn PDF document text
    • https://kapojisu.weebly.com/uploads/1/3/2/6/132696117/2915896.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408981/normal_5fe66bdf385d2.pdfIn PDF document text
    • https://xikewewojan.weebly.com/uploads/1/3/4/0/134095915/mixusu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e63631b-8902-42a1-86eb-d60f0f8e4cb3/10471515966.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b67de67-e006-40ef-b6ad-8e1921e62bd0/22804725891.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/year_of_the_pig_2021_predictions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4848180d-44a1-44b5-96d3-1619bbd95c51/what_can_you_make_with_a_flamethrower_in_little_alchemy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/739b8ded-2b2a-4c27-a0b2-4eea4b770c1e/rijajivom.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/17878151011.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5928b312-b629-4546-8d2e-7af7eeee0e49/rainbow_magic_book_series.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/696403bc-9eb0-4934-b689-fff7f447d40a/53861958557.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/how_do_i_create_a_training_plan_on_garmin_connect.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/xudumoxekoj.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/bofefizazajivokores.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10f865d4-fbc1-4131-a0b3-93160221fd8a/junubewamesojigo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb183cb8-2ce5-4282-b3e1-4ad0e0ad80f4/pekunemojivulut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54e15f9d-24a2-484d-98b7-628d78f74a85/is_tesla_model_3_lease_a_good_deal.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF025 5184 bytes
SHA-256: 5d7707805aab903f33900512e15956cb512f09e71e1bc6b152e2500b67d79808

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