Malicious PDF — malware analysis report

Static analysis result for SHA-256 65c18c7f37b7f1f7…

MALICIOUS

PDF

68.8 KB Authoring application: PDFedit
MD5: 2ba874c738fc6ac506af98bc328bf1c8 SHA-1: 468735efe509262128479224889e2bb0e12344fa SHA-256: 65c18c7f37b7f1f7f3176a3143bdf69b250c39633667cd34b82ad41f40026e47
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, identified as a link farm, which is a common technique for phishing or distributing further malware. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the presence of numerous external links suggests a watering hole or phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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
  • 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://buyerstreasure.com/uploads/1/3/0/6/130620893/2711944.pdf
    • http://cpanel.enlightenedheartoc.com/uploads/1/3/0/7/130739396/zetozomanoxo_sazalav_jovav_kalerajugip.pdf
    • http://thebaskamteam.com/uploads/1/3/0/6/130639776/9421be5fab.pdf
    • http://brightgirlbook.com/uploads/1/3/0/7/130738915/5700002.pdf
    • http://brookvalleymarketing.com/uploads/1/3/0/4/130489001/9137424.pdf
    • http://mail.belveder.ch/uploads/1/3/0/6/130621176/9303780.pdf
    • http://cpanel.susanrydberg.com/uploads/1/3/0/2/130288986/pewoduje.pdf
    • http://10iramistakes.com/uploads/1/3/0/3/130323762/9087627.pdf
    • http://desertside.com/uploads/1/3/0/7/130775516/95b23a.pdf
    • http://www.teamtakahe.com/uploads/1/3/0/4/130478566/703631.pdf
    • http://scmegale.com/uploads/1/3/0/7/130739850/98aed877e8023.pdf
    • http://www.fullerlifewatermi.com/uploads/1/3/0/6/130620917/firukefunepox_zimiwo_zalupovofarap_puferiwuta.pdf
    • http://5foot1ninja.com/uploads/1/3/0/8/130814292/7638462.pdf
    • http://shop.skyboxapparel.com/uploads/1/3/0/4/130478975/7545423.pdf
    • http://wearecontagious.com/uploads/1/3/0/5/130545573/781508.pdf
    • http://siteowner.net/uploads/1/3/0/5/130590478/ridevajobi.pdf
    • http://mx.rosewoodgoldens.com/uploads/1/3/0/3/130312951/telowosavepabud-rafuwod.pdf
    • http://starvedrockarea.com/uploads/1/3/0/4/130476519/walewuxamefib.pdf
    • http://bucksnortnrunclayworks.com/uploads/1/3/0/7/130738559/tubonusuvimofer_majusuke.pdf
    • http://motivationalkeynotespeakeralberta.com/uploads/1/3/0/3/130323268/6582850.pdf
    • http://www.mainstreetchardon.org/uploads/1/3/0/7/130738720/kujamerira-vaminagalok-koligiwevekakos.pdf
    • http://mx.jhigh18.com/uploads/1/3/0/9/130969987/130969987.html#images+of+ancient+egyptian+buildings
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000016ae.bin
854cf3081365878975667dccc07338a7c625062137e40d3b0ef8041c04d9c571
pdf-font-stream PDF embedded font (sfnt) at offset 0x16AE 8496 bytes
font_01_sfnt_off0000c830.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63
pdf-font-stream PDF embedded font (sfnt) at offset 0xC830 16036 bytes