Malicious PDF — malware analysis report

Static analysis result for SHA-256 a577b54a23e8f1c0…

MALICIOUS

PDF

57.1 KB Authoring application: Smallpdf Desktop
MD5: 3d3f60eaff700a2e13c9c673b29a80f2 SHA-1: b15106fac14a33068eb4fb3924d92307638400ac SHA-256: a577b54a23e8f1c025ffd9d2bd4588a2206b1885a1805df54cfa147ac88e4605
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection of 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or malicious redirection intent. The document body, though heavily obfuscated, contains references to medical conditions and URLs, reinforcing the lure aspect. The primary attack pattern involves directing users to a network of suspicious PDF files hosted on various domains.

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://hostmaster.deek.community/uploads/1/3/0/5/130588169/pepokup.pdf
    • http://mybabybubulah.com/uploads/1/3/0/4/130435499/4120272.pdf
    • http://lesbianrimjob.com/uploads/1/3/0/6/130639681/lewivafoxanud.pdf
    • http://hostmaster.devauzet.de/uploads/1/3/0/2/130289441/bitage.pdf
    • http://norcaldjs.net/uploads/1/3/0/5/130589050/zuboxosagaves.pdf
    • http://onitscore.com/uploads/1/3/0/5/130547405/sinosose.pdf
    • http://louiseeasterisland.com/uploads/1/3/0/7/130738806/fifitinatoz-lugikomisalex-tujutidineros.pdf
    • http://davidrocks.org/uploads/1/3/0/5/130551625/xelojemivazoxopifa.pdf
    • http://johnnyconde.com/uploads/1/3/0/8/130814311/f3a96f88feb.pdf
    • http://storypendants.com/uploads/1/3/0/5/130539053/7089378.pdf
    • http://derrettphoto.com/uploads/1/3/0/4/130483507/gubexujoreg.pdf
    • http://threelittlebirdsshop.com/uploads/1/3/0/5/130589277/6183375.pdf
    • http://myoffgridpower.com/uploads/1/3/0/8/130814645/fakiwitukaxevilem.pdf
    • http://alsupmusic.com/uploads/1/3/0/6/130605077/9454619.pdf
    • http://primarynursing.net/uploads/1/3/0/5/130588913/e10204bdeed.pdf
    • http://farmersmarketdogtreats.com/uploads/1/3/0/2/130287842/1e3393654663.pdf
    • http://jornadasadopcionzaragoza.com/uploads/1/3/0/2/130291707/padatipuxiw.pdf
    • http://yash24supportedliving.com/uploads/1/3/0/6/130622063/wavik.pdf
    • http://intukids.com/uploads/1/3/0/6/130603783/740390.pdf
    • http://nakedbuck.com/uploads/1/3/0/3/130379315/kadekul_gulowedubomu_lizafedozibiget.pdf
    • http://stockmi.com/uploads/1/3/0/2/130291676/xekodasizatigo-wodobutunogum-dewarolakizono.pdf
    • http://host238.carmichaelnl.com/uploads/1/3/0/3/130323424/130323424.html#signs+of+pre+eclampsia+at+27+weeks

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000100b.bin
c53198a675e5ffed9065c8353595880af19e0e7dcf44ded54e370292b49832bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100B 7844 bytes
font_01_sfnt_off000088d0.bin
75ad5726b260fca9c3b66ca94450239fbc156c1891091fcfcfab965e4b2051b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88D0 16376 bytes

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