Malicious PDF — malware analysis report

Static analysis result for SHA-256 50846b2a13febad0…

MALICIOUS

PDF

40.6 KB Authoring application: PDF Studio
MD5: e07afb578c279c436e3a667093ac88bb SHA-1: 6b49874490fcb1c8b6e5fc41722bbb132d777e70 SHA-256: 50846b2a13febad0d737bd291bf6566b9bcbf11f1fb4c826681ddb4782f6a991
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique commonly used for SEO poisoning or phishing. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body, though partially corrupted, suggests a lure related to an 'Angles of elevation and depression worksheet', which is likely a pretext to disguise the malicious links.

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://pasteldonuts.com/uploads/1/3/0/6/130604844/7346256.pdf
    • http://kelseastarrawakening.com/uploads/1/3/0/9/130969959/mewenunu.pdf
    • http://autodealerdigitalsolutions.com/uploads/1/3/0/4/130483210/nuxefewe-wipefazage-ruvebiser.pdf
    • http://gabrielledrouin.com/uploads/1/3/0/5/130589219/nivesa.pdf
    • http://toprackbilliards.com/uploads/1/3/0/4/130491322/voliwiwegele-jorur-sifeg-tokozakarited.pdf
    • http://lmkbilling.net/uploads/1/3/0/2/130272342/9208694.pdf
    • http://denelojewelrydesign.com/uploads/1/3/0/7/130775768/vosilasikes.pdf
    • http://perthempowered.com/uploads/1/3/0/6/130604610/femugu.pdf
    • http://mrsrenohasclass.com/uploads/1/3/0/7/130775383/susutek_mofovaxogosavur.pdf
    • http://www.pugsleydigitalmarketing.com/uploads/1/3/0/8/130874011/lutobuf_sirekarirasox_fazifos_muziturixapiku.pdf
    • http://www.jaamatka.info/uploads/1/3/0/5/130550688/xosukedif.pdf
    • http://cpanel.celtcraftdesigns.com/uploads/1/3/0/5/130588269/kepidute_vegalilumak_narojuku.pdf
    • http://colincabana.com/uploads/1/3/0/4/130476866/ninobaxune_jugirelovu_vowimubedivara_befasovikigi.pdf
    • http://www.giftshopgifts.com/uploads/1/3/0/6/130620470/supubelipale-wuzix.pdf
    • http://markkraemer.net/uploads/1/3/0/6/130621557/f56ab73baf.pdf
    • http://www.forgiveninchrist.net/uploads/1/3/0/6/130640031/7315246.pdf
    • http://aprendeinlgesrapido.com/uploads/1/3/0/5/130539105/5910037.pdf
    • http://akhdc.com/uploads/1/3/0/6/130622084/6823271.pdf
    • http://chasey-lain.com/uploads/1/3/0/2/130289171/1001777.pdf
    • http://bagsofun.co.uk/uploads/1/3/0/2/130289315/9078124.pdf
    • http://moneymentorph.com/uploads/1/3/0/6/130620758/sekarabulej-famepukikal-pomeniwutuku-doroku.pdf
    • http://placegram.net/uploads/1/3/0/4/130477584/tabupo.pdf
    • http://coopersflamethrower.com/uploads/1/3/0/7/130775516/jaxogo.pdf
    • http://bigdaddyshane.com/uploads/1/3/0/7/130739654/7f31818848162.pdf
    • http://webmail.danielvm.com/uploads/1/3/0/6/130603917/130603917.html#angles+of+elevation+and+depression+worksheet+8-4
    • http://autodealerdigitalsolutions.com/uploads/1/3/0/4/130483210/nuxefewe

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002b7f.bin
182009a43b6ef6cc2a2225c1e91980314dbcd551335d7ea568c4890e3b1c54cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x2B7F 2852 bytes
font_01_sfnt_off00003877.bin
75496ed1ce07ae2efc937af6d0f8fbdb2134f9dd28c2861901066ad1c4cfb396
pdf-font-stream PDF embedded font (sfnt) at offset 0x3877 8644 bytes