Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d3612b1ff107bb8…

MALICIOUS

PDF

50.0 KB Created: 2020-03-12 05:46:39 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 55beaf5592ae7a1353c1e2dc16e1e57e SHA-1: 3cdd84fab2a6c91caccf5e863bed5390698f0ace SHA-256: 2d3612b1ff107bb86c5fc515534a66f3713afefe1592208b2cbc3695f1a27e2d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, many of which are SEO-optimized and point to what appears to be a link farm. The document body text and one of the extracted URLs suggest a lure for downloading 'Adobe Acrobat Professional 7 free download full version for Windows 7'. This indicates a social engineering tactic to trick users into visiting malicious sites or downloading malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 http://hostmaster.salon225.com/uploads/1/3/0/4/130488299/130488299.html#adobe+acrobat+professional+7+free+download+full+version+for+windows+7 PDF link annotation
    • http://mail.frequencysecurity.com/uploads/1/3/0/5/130550970/feremotejuteboduveg.pdfIn PDF document text
    • http://www.coreycieslak.com/uploads/1/3/0/5/130551671/6381468.pdfIn PDF document text
    • http://rorylambie.com/uploads/1/3/0/7/130775588/4c727ef1489.pdfIn PDF document text
    • http://miljohelse.com/uploads/1/3/0/2/130273980/06b64.pdfIn PDF document text
    • http://74-123-72-209.mgwnet.com/uploads/1/3/0/2/130291489/8d2dbffc98048.pdfIn PDF document text
    • http://msmcelroy.net/uploads/1/3/0/5/130588644/416419.pdfIn PDF document text
    • http://www.stratellis.com/uploads/1/3/0/5/130550750/koxabobunesa.pdfIn PDF document text
    • http://skipcoryell.com/uploads/1/3/0/5/130551524/35b49fa3fec.pdfIn PDF document text
    • http://www.foreveryesweddings.com/uploads/1/3/0/6/130621277/7667858.pdfIn PDF document text
    • http://casbaad.it/uploads/1/3/0/5/130590208/fimedogujoji.pdfIn PDF document text
    • http://mx.jhigh18.com/uploads/1/3/0/9/130969987/7b67ca.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://www.adobe.com/).NotoIn PDF document text
    • http://www.google.com/get/noto/http://www.adobe.com/type/ThisIn PDF document text
    • http://scripts.sil.org/OFLNotoIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CED 9276 bytes
SHA-256: f702b2ffe74de128aa3c44d079694625e7c57ff5507f8333c83c6acc8d0bd812
font_01_sfnt_off00008e3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E3A 6544 bytes
SHA-256: fd22af53f2844f775e2788e663f76d51cbd1f673c8a6c692d2e507cbfd993ddd
font_02_sfnt_off0000a3b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3B1 16488 bytes
SHA-256: d8fa1d180e0a505d0c2b16a5f695b88c8b58e4db502161fc5572c07a7daa196e

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