Malicious PDF — malware analysis report

Static analysis result for SHA-256 725e0e7f69fb0301…

MALICIOUS

PDF

41.3 KB Created: 2020-03-26 06:22:50 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 8c5450610dde6673a77d2eaf4348785d SHA-1: efaddbc8da6b4eac5b83eb592d15c9858b327dba SHA-256: 725e0e7f69fb0301eac918bd126f7316546fd85796b8d68ea02f451b2c960e4e
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which are algorithmically generated and point to other PDFs. This suggests a link farm or SEO poisoning tactic designed to drive traffic to malicious or low-quality content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://2020blue.org/uploads/1/3/0/7/130738553/130738553.html#thyroid+cysts+icd+10
    • http://spreadinggoodnews.com/uploads/1/3/0/4/130476514/3745421.pdf
    • http://woodgatebeachkayakandpaddleboardhire.com/uploads/1/3/0/5/130544781/subuxariteziz-mejusefosetuk-fuvufoxina.pdf
    • http://cobbchaptertwo.com/uploads/1/3/0/5/130590564/dosegu.pdf
    • http://ontrackrti.net/uploads/1/3/0/7/130776326/zimofokag-robawujapinad-tibaw.pdf
    • http://dollfiefamous.com/uploads/1/3/0/5/130542934/69ba467c53f.pdf
    • http://dwiconcord.com/uploads/1/3/0/7/130739303/lagoxipixotes.pdf
    • http://thebrewcraft.com/uploads/1/3/0/2/130270987/xavusa_wobuxirete.pdf
    • http://harlemdata.com/uploads/1/3/0/7/130775436/tefel.pdf
    • http://northeastcarpentry.net/uploads/1/3/0/5/130588872/98138e9b59f.pdf
    • http://lesorfevres.net/uploads/1/3/0/8/130814642/luxarifibaru.pdf
    • http://mk-contractor.com/uploads/1/3/0/5/130588708/58ba8a.pdf
    • http://pollackmyballs.com/uploads/1/3/0/9/130969839/6018256.pdf
    • http://www.getitaway.designpreviewer.com/uploads/1/3/1/1/131163984/fupixel.pdf
    • http://cmcreativemarketing.net/uploads/1/3/0/6/130621371/2384173.pdf
    • http://bigislandxxx.com/uploads/1/3/0/4/130489358/vuzinebolexuborasa.pdf
    • http://mta-sts.mail.marthastjean.com/uploads/1/3/0/7/130775346/7d72bef7e00.pdf
    • http://stonebenchesjourney.com/uploads/1/3/0/4/130477363/nasuge_fuwipatizipa_tibene.pdf
    • http://brownskinwhiteskin.com/uploads/1/3/0/6/130620942/7113004.pdf
    • http://megoody.com/uploads/1/3/1/1/131164013/3db41d2fbe01.pdf
    • http://www.skybluecounseling.com/uploads/1/3/0/2/130273944/ketez.pdf
    • http://ed2connect.com/uploads/1/3/0/8/130813668/9783491.pdf
    • http://www.gracielacafe.com/uploads/1/3/0/7/130739196/kuzabiseras.pdf
    • http://tylerannetownsend.com/uploads/1/3/0/3/130313194/7546307.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000778e.bin
7ed8b47c35a96a808881f78897c98e400453ba9cba8b7e3237485bd373ea5b9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x778E 8352 bytes

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