Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c48c9f6ad7be086…

MALICIOUS

PDF

61.3 KB Created: 2020-03-07 20:08:20 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-07
MD5: 452d1a8ff2c5aaafa7bd16afdfcd65ec SHA-1: af997b3fb22a01c52a3c87c5225c3effa75c1558 SHA-256: 3c48c9f6ad7be0869b9e93cda265078c0bef29da033e15d54470913f6cbecb9f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many of which are SEO-optimized and point to various domains. This behavior is indicative of a link farm or redirection scheme, likely intended to lead users to malicious content or phishing sites. The document body itself contains garbled text and metadata, but the presence of numerous external URLs is the primary indicator of malicious intent.

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://74-123-79-37.mgwnet.com/uploads/1/3/0/8/130874309/130874309.html#secondary+amenorrhea+labs PDF link annotation
    • http://www.dowell1c.com/uploads/1/3/0/5/130550838/vufowopagamizarus.pdfIn PDF document text
    • http://purplesagehealing.net/uploads/1/3/0/6/130621214/kikubixarugojivebigo.pdfIn PDF document text
    • http://www.dpz.jezus.pl/uploads/1/3/0/5/130590416/soronirexilibebazu.pdfIn PDF document text
    • http://333tool.com/uploads/1/3/0/6/130604896/jubagisumofazal.pdfIn PDF document text
    • http://mdroe.com/uploads/1/3/0/2/130289429/suvab.pdfIn PDF document text
    • http://www.apexpeoconsultants.com/uploads/1/3/0/5/130543648/xasudimupilitiketowu.pdfIn PDF document text
    • http://sensaur.com/uploads/1/3/0/7/130776847/vuvobevalufalador.pdfIn PDF document text
    • http://scriptwriterscene.com/uploads/1/3/0/7/130775583/nusufoke_mazunurobeki_kirij_lupezejewobiz.pdfIn PDF document text
    • http://healinghandstrt.com/uploads/1/3/0/5/130550895/jilebewurigej-tuvofifebubigag-zokefu-favofi.pdfIn PDF document text
    • http://yachtrock.biz/uploads/1/3/0/4/130483656/xufaxim.pdfIn PDF document text
    • http://labirroteca.info/uploads/1/3/0/2/130272083/f9a8af0.pdfIn PDF document text
    • http://www.cbcurrie.com/uploads/1/3/0/7/130776111/bivide.pdfIn PDF document text
    • http://cameronjkennedy.com/uploads/1/3/0/6/130621312/2bb8e.pdfIn PDF document text
    • http://bluethistle.agency/uploads/1/3/0/4/130477146/memelubokasonojifa.pdfIn PDF document text
    • http://www.buddingbuddhas.net/uploads/1/3/0/3/130323564/bexikujaxebogib_bupumidabu.pdfIn PDF document text
    • http://dsskinstudio.com/uploads/1/3/0/2/130291589/mopug.pdfIn PDF document text
    • http://farmyields.org/uploads/1/3/0/6/130639362/2184840.pdfIn PDF document text
    • http://greaterfayettecountychamber.org/uploads/1/3/0/7/130775136/ebfdacae0b.pdfIn PDF document text
    • http://littlehousefoodsocal.com/uploads/1/3/0/5/130588551/jubabiviterove-vonabi-sorinurawasago-feveguvajap.pdfIn PDF document text
    • http://www.invibecreativeartstherapy.com/uploads/1/3/0/5/130551087/8f4fc82.pdfIn PDF document text
    • http://wiispoland.org/uploads/1/3/0/7/130738912/ccc619.pdfIn PDF document text
    • http://www.romancereads.net/uploads/1/3/0/7/130775961/zawupego.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_01_sfnt_off0000dcdb.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_01_sfnt_off0000dcdb.bin)
    • 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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn extracted file (font_01_sfnt_off0000dcdb.bin)

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAE6 8948 bytes
SHA-256: ff282af20e54fbc05135e1d36fd2118eb5f4b11436a48454f2f51f09ed678369
font_01_sfnt_off0000dcdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDB 2860 bytes
SHA-256: 4d9ec2aec8f1ca6bebe1b56492fd55a77bba3a6e98efb76508c1b835d4eb9912

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