PDF malware analysis — malicious · 587ef981b874bbe5

MALICIOUS

PDF

54.2 KB Authoring application: Nitro PDF

MD5: d5ab1c21b8c4c4a50f88647c6956525d SHA-1: 9518eb2ad67483fa6ced3006157e6fa0adc53fbd SHA-256: 587ef981b874bbe5af6d79ca69fbf0916c4f7747dca589a2a8ffc0c5d90b4a9f

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links to external PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content, as flagged by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection further support the malicious nature of this file. No scripts were extracted, and the document body content was heavily corrupted, making it impossible to determine a specific lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 3

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

ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
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://movetoamendpdx.org/uploads/1/3/0/3/130313186/1344ec5b200d90.pdf
- http://myitk.us/uploads/1/3/0/2/130273803/vomurapofinuso-bakifujibuxefon.pdf
- http://cpanel.true-leaf.net/uploads/1/3/0/4/130489044/pozinegot_tilurejexunowel_kifabuxolizi_leviku.pdf
- http://prelude-to-action.com/uploads/1/3/0/3/130323478/fatotew.pdf
- http://prosisw.com/uploads/1/3/0/5/130550742/varajexafumivoz-derozubeni-pajilot-sesixaderusapes.pdf
- http://www.ryanjameslandscapingri.com/uploads/1/3/0/8/130874564/4217797.pdf
- http://jvwritingv2.club/uploads/1/3/0/8/130814143/c2a365e7f3e0400.pdf
- http://aandshardwoodflooring.com/uploads/1/3/0/4/130476066/masijo-jodugegepug-jidisorusujor.pdf
- http://waterstonecafe.com/uploads/1/3/0/7/130776755/rodazatifanetuzubas.pdf
- http://capdisttutor.com/uploads/1/3/0/3/130313434/birelesawax.pdf
- http://matthewgeller.net/uploads/1/3/0/5/130590059/mejip.pdf
- http://lakeviewbuchanan.com/uploads/1/3/0/3/130323127/7614820.pdf
- http://northolmesjuniorschool.com/uploads/1/3/0/6/130605036/tuxoxaresax.pdf
- http://mail.demo.famhealth.com/uploads/1/3/0/5/130547112/9311119.pdf
- http://angeliquedeclercq.be/uploads/1/3/0/4/130478106/dudasizemip.pdf
- http://clarender.com/uploads/1/3/0/4/130476069/4419e.pdf
- http://hoppipop.com/uploads/1/3/0/3/130313564/8c4741d5c5b9.pdf
- http://www.sfhsgirlslax.com/uploads/1/3/0/2/130274343/6955498.pdf
- http://bssdnp.salon225.com/uploads/1/3/0/6/130639294/130639294.html#how+to+convert+a+polar+equation+to+a+cartesian+equation

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00004305.bin` `44bc507e6feece4b5ec51d67d3f3322caae0b47fa6f13d11cd391cbfb070b514`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4305	6644 bytes
`font_01_sfnt_off0000530a.bin` `319f9c996375511bbe969d0b76506a2162f7d522988cd2631b41a5a1e417b94d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x530A	16040 bytes
`font_02_sfnt_off00006731.bin` `db056d6b75001de5db1a3468c5d064d74740f4b0d9fc0843f21179ce511eb003`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6731	2852 bytes
`font_03_sfnt_off00007412.bin` `7b96095765616586e967c6c2dec577b5d6056b072e23222df6ff027231d72286`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7412	8584 bytes

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