PDF malware analysis — malicious · 9019e540e9ffc625

MALICIOUS

PDF

42.1 KB Authoring application: pdf-parser First seen: 2020-09-24

MD5: b2bd24f6818f3c42f94334252fa33871 SHA-1: d2fcf28cb7e7860e6dd581797903aac85af4ff38 SHA-256: 9019e540e9ffc625e25b532138a567c874be0448b5763d95cef208ba6dd7a684

192 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a large number of external links to other PDF files hosted on various domains, indicative of a link farm or SEO scam. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to malicious content or phishing sites. No scripts were extracted, but the primary attack pattern involves directing users to external resources.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
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.
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.
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://www.weekly-brew.blog/uploads/1/3/0/9/130969298/zixubuzepe.pdf In PDF document text
- http://animals-pro.com/uploads/1/3/0/6/130621333/8090016.pdfIn PDF document text
- http://www.missinglinkbrewing.co.uk/uploads/1/3/0/6/130621965/gowelunepuduselawogu.pdfIn PDF document text
- http://quirkytowers.com/uploads/1/3/0/2/130272234/975689.pdfIn PDF document text
- http://www.floodfiresolutionsdryityourself.com/uploads/1/3/0/6/130640209/vosigesa.pdfIn PDF document text
- http://cookacousticalconsultants.com/uploads/1/3/0/5/130588907/1790155.pdfIn PDF document text
- http://whythedogdied.com/uploads/1/3/0/2/130272432/razit.pdfIn PDF document text
- http://electromecaniqueinternational.com/uploads/1/3/0/6/130621547/3653276.pdfIn PDF document text
- http://vanessagomezartistry.com/uploads/1/3/0/6/130622013/wunufepilem_jopipo_xupupakizubile.pdfIn PDF document text
- http://chalalagiveaway.com/uploads/1/3/0/2/130289256/xojok.pdfIn PDF document text
- http://donknation.com/uploads/1/3/0/4/130478663/levin.pdfIn PDF document text
- http://shangrila.com/uploads/1/3/0/5/130545633/4591198.pdfIn PDF document text
- http://houseenvy.com/uploads/1/3/0/2/130289577/8978138.pdfIn PDF document text
- http://www.twincityphotography.com/uploads/1/3/0/3/130313582/8554330.pdfIn PDF document text
- http://74-123-72-249.mgwnet.com/uploads/1/3/0/7/130775228/130775228.html#phosphate+buffer+solution+ph7In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000033f4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x33F4	16036 bytes
SHA-256: `779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63`
`font_01_sfnt_off00004b2f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4B2F	7788 bytes
SHA-256: `a6e4611ec445e544347bec41a9fc52de2c649a83711619e3ca7b37ae97f574e3`

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