Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0df077d276c9714…

MALICIOUS

PDF

40.1 KB Created: 2020-03-10 04:30:24 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: a28831b80ea21cff99b5eaf826404f9a SHA-1: f442fc56a9335915ea54e14236021edc987f76f0 SHA-256: b0df077d276c971470f89f0bb49aa2fd00d599a11a5e93de63158d9d143d7309
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links to various domains, identified as a 'PDF_SEO_LINK_FARM' heuristic. The document body, though partially corrupted, contains a title related to 'adding and subtracting decimals worksheets 6th grade answer key', suggesting a lure. The primary attack pattern involves redirecting users to a multitude of external PDF files, likely for SEO spam or to host malicious payloads.

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://2onrtn.bdgct.com/uploads/1/3/0/8/130814343/130814343.html#adding+and+subtracting+decimals+worksheets+6th+grade+answer+key PDF link annotation
    • http://ellisroadpde.com/uploads/1/3/0/5/130539517/pigafolavatevib_rixopomulonab_tekejuduk.pdfIn PDF document text
    • http://homeiswherethemortgageis.com/uploads/1/3/0/4/130483204/bagasetuvepapures.pdfIn PDF document text
    • http://sassyscraps.com.au/uploads/1/3/0/5/130544313/81220f3838549ec.pdfIn PDF document text
    • http://mail.bentwrappedandhammered.com/uploads/1/3/0/6/130639811/3572160.pdfIn PDF document text
    • http://driftwithme.com/uploads/1/3/0/6/130640126/fozubozobuvekup.pdfIn PDF document text
    • http://joealford.co.uk/uploads/1/3/0/4/130483123/pokodireme.pdfIn PDF document text
    • http://grantfit.net/uploads/1/3/0/5/130551922/a5afe5ce40a82.pdfIn PDF document text
    • http://urbannations.info/uploads/1/3/0/4/130476307/fajubuzitu-tagiro-fewagoxewef-kasadatafa.pdfIn PDF document text
    • http://shine2bright.com/uploads/1/3/0/6/130604564/0ba8a9555ecdf.pdfIn PDF document text
    • http://preethiajay.com/uploads/1/3/0/8/130814120/2624230.pdfIn PDF document text
    • http://museandreign.com/uploads/1/3/0/7/130775796/5a526036.pdfIn PDF document text
    • http://fabstarr.com/uploads/1/3/0/4/130475992/be3ff014.pdfIn PDF document text
    • http://www.plentyoffishconfirmationpage.com/uploads/1/3/0/4/130483539/ralubizerosix.pdfIn PDF document text
    • http://spatialdm.com/uploads/1/3/0/2/130287799/2077215.pdfIn PDF document text
    • http://alpha-bot.com/uploads/1/3/0/6/130604039/2b3c9.pdfIn PDF document text
    • http://noracasare.com/uploads/1/3/0/3/130324324/rewibad_baxuki_jipof_fupaxoxadapujex.pdfIn PDF document text
    • http://12ster.com/uploads/1/3/0/6/130621516/pukove-vekivapipus-gagaf.pdfIn PDF document text
    • http://slsfnc.com/uploads/1/3/0/6/130603929/848150.pdfIn PDF document text
    • http://bus303group9project.com/uploads/1/3/0/8/130813669/170b39f33.pdfIn PDF document text
    • http://nextlevelmortal.com/uploads/1/3/0/6/130604557/5522171.pdfIn PDF document text
    • http://inspired2eatright.com/uploads/1/3/0/9/130969260/9fc6ef7e33afab.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
🗂 Part of campaign: 12ster.com 5 samples

Related samples 2

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7248 8240 bytes
SHA-256: 8d368958415796acc907ec6bc53c3a734de72f89b2d8a0f8837c2d3c59b46964

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