Malicious PDF — malware analysis report

Static analysis result for SHA-256 39a3f2c3522c0232…

MALICIOUS

PDF

76.6 KB Created: 2021-01-11 23:49:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: be2b3ea4158363c466231ff87c893de5 SHA-1: ecd82db65ed76bc130a6690fe7b4bf46d52a8876 SHA-256: 39a3f2c3522c02327231068341eeea67a3585cced6c5bcabf05455f866e22789
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 0.9997

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://trafffi.ru/123?utm_term=pokemon+3ds+randomizer PDF link annotation
    • https://paboludozov.weebly.com/uploads/1/3/4/3/134333588/73fd5944bd6c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393369/normal_5fe983481943c.pdfIn PDF document text
    • https://dobopekajami.weebly.com/uploads/1/3/4/3/134314215/kisilejogalexipagi.pdfIn PDF document text
    • https://site-1084052.mozfiles.com/files/1084052/the_king_of_fighters_allstar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387567/normal_5f8dd153e1e2c.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/bulalowisu/83538799257.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/92188182894.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/rowevutewab.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/outlook_calendar_does_not_sync_with_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/86917423027.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/542485801.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/zenowifirafegut.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/vikonebopirinijasebede.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA5A 5220 bytes
SHA-256: c9c5ff23c19e4392e85bcd785c8c22fc4b5b04b2ba421fa430d233bbe15df3f8
font_01_sfnt_off0000ec11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC11 10752 bytes
SHA-256: d26cac16db83cfededfdae357e9c39ad3992344c0dcbf57075b7758691f6cffe
font_02_sfnt_off000110b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110B9 16088 bytes
SHA-256: c8cad0fcbf711734ba90d1bf0f33d5774ae0d43a5fc07b95f2d0d23150af1919

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