Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccd4a53108e67592…

MALICIOUS

PDF

84.1 KB Created: 2021-03-27 16:38:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6bcd01e9f3a101c70c7fab21d230d29b SHA-1: 5ab02e66dde25cbb86188330ebeff3b930d25c5c SHA-256: ccd4a53108e67592d28fa5d604b228b1f842ca365a679f2bfb98a668f7f103d5
186 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ponafet.ru/wix?keyword=real+steel+boxing+champions+mod+apk+ios PDF link annotation
    • http://mini-camera-super.club/duwixiwetosorevojitowomfoykv.pdfIn PDF document text
    • http://ductsunlimitedins.com/firajilofarobohur.pdfIn PDF document text
    • https://bilujadaju.weebly.com/uploads/1/3/4/7/134772480/0815f00702.pdfIn PDF document text
    • http://xviiivbgz.com/xixawaxepuxiriayys4.pdfIn PDF document text
    • https://fafamamijusoma.weebly.com/uploads/1/3/4/3/134371196/keteteximak.pdfIn PDF document text
    • https://zubikazosiz.weebly.com/uploads/1/3/4/7/134761183/tikigipemobeno_bafuweladolika.pdfIn PDF document text
    • https://bedexupef.weebly.com/uploads/1/3/0/7/130775630/jamitidoraju.pdfIn PDF document text
    • http://zuvoxikoxeseko.22web.org/kebibug.pdfIn PDF document text
    • http://milanomoda-italy.website/rajewof8a632.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gonedufugeferat.rf.gd/beats_studio_3_wireless_white_and_gold_unboxing.pdfIn PDF document text
    • https://36535336-4f9e-4c0a-b1ad-3385cb5d4299.filesusr.com/ugd/15ebe2_ae833e1df43548dfb1219f5cb1f1e637.pdf?index=trueIn PDF document text
    • https://2791e1c6-719d-47aa-bdc5-1556df251b63.filesusr.com/ugd/7757c5_d574da2a7a074149bc198f753c105c0f.pdf?index=trueIn PDF document text
    • http://jilovimox.rf.gd/66818607711.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/stanley_model_number_bc15bs.pdfIn PDF document text
    • https://3064a0a7-8496-4b95-be1e-56094aee372f.filesusr.com/ugd/0cf4b9_a6feb9bdd55a434692de0209cccade63.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/58904208821.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/batman_dark_knight_rises_apk_data.pdfIn PDF document text
    • https://550dfcec-0280-4316-a0d5-68b74a7a20b9.filesusr.com/ugd/f59309_30e9b52568774dfc962ac8803bd6f570.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/simujix/pugilobulus.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_off0000fc84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC84 2880 bytes
SHA-256: ac64b8af80fcca1e0e594fba8a0f1e66fdecb42d42f059741c9e9f76428d751e
font_01_sfnt_off000106c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C3 5672 bytes
SHA-256: 9d7cdfbe0b1524c507dfe7a041081b4e560bdcd41c1696c896f3595ffe59c30a
font_02_sfnt_off000119f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F3 11992 bytes
SHA-256: 04c444d5daa883b5dc517369ba2ffed333ae0dafd71735981d7ff3b67cb791a1

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