Malicious PDF — malware analysis report

Static analysis result for SHA-256 8536fcc878480f3f…

MALICIOUS

PDF

59.5 KB Authoring application: LibreOffice
MD5: 241febaac4d85ba0a01a8bad006e7e8e SHA-1: c283d8d638da9e9a5ebb4af2d583991d28a9d760 SHA-256: 8536fcc878480f3fc963cc38970aafe5ef80d910d3b91d2f77b599d5f37c1f27
152 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 document body, though partially corrupted, also contains several of these URLs. This suggests the primary purpose of the document is to act as a link farm, likely for phishing or distributing further malware. The ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0 further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dulichsapalaocai.com/uploads/1/3/0/6/130620395/4479273.pdf
    • http://chuysmex.com/uploads/1/3/0/3/130313243/822b2.pdf
    • http://carolinegottlieb.com/uploads/1/3/0/6/130620437/1405f.pdf
    • http://bobdoak.us/uploads/1/3/0/6/130620505/df6b3.pdf
    • http://dickersonconstruct.com/uploads/1/3/0/6/130603673/1481503.pdf
    • https://ribewaka.weebly.com/uploads/1/3/0/2/130272848/mitis_zaxaledawire_bapubagogajer_wemeresuvozo.pdf
    • http://nathanbarot.com/uploads/1/3/0/6/130621507/ximakewekobunapawu.pdf
    • http://quedcard.com/uploads/1/3/0/2/130289688/vatufopiwebe_xuwepojite.pdf
    • http://vetasu.rostelekomrt.ru/uploads/2020/01/27/galasalozetalaw_poput_wureko_netetozijupirul.pdf
    • http://sabuyjaishopping.com/uploads/2020/01/27/nasalunot-kafuzewafub-nibapurivo.pdf
    • http://mukizagibu.market-lm.com/uploads/2020/01/27/9186995.pdf
    • http://prevention4balance.com/uploads/1/3/0/3/130313294/5629347.pdf
    • http://jungandsisco.com/uploads/1/3/0/2/130289532/bevixajopew.pdf
    • http://kingdomdetail.com/uploads/1/3/0/2/130287456/luxurekedo.pdf
    • http://readersenvy.com/uploads/1/3/0/5/130588654/fibonoxaluxusor.pdf
    • http://womod.loginenbanque.com/uploads/2020/01/27/garubo_mapurebij.pdf
    • http://gisenorax.odnavosmaya.ru/uploads/2020/01/27/xikawotuke.pdf
    • http://cameronayres.com/uploads/1/3/0/4/130435701/wuvotukavafot.pdf
    • http://wojig.tripmakanangin.com/uploads/2020/01/28/34ac31f13107.pdf
    • http://bevo.shoplife.xyz/uploads/2020/01/27/6871495.pdf
    • https://fibutigojojox.weebly.com/uploads/1/3/0/2/130289611/6b6cda502825e2.pdf
    • http://behumble.fitness/uploads/1/3/0/5/130546543/4389033.pdf
    • http://benkregel.com/uploads/1/3/0/3/130324005/130324005.html#glioblastoma+multiforme+sintomas+pdf

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000101a.bin
a1aaae946e7aadd31881c0d9dc744dbbfe0649d2e4c39f95ee6b3e14a0dee15c
pdf-font-stream PDF embedded font (sfnt) at offset 0x101A 9340 bytes
font_01_sfnt_off000095bd.bin
41b1c0bc873e425b136139b0b985f763bdaa709cfb7ed2963d0e22fea2b8f608
pdf-font-stream PDF embedded font (sfnt) at offset 0x95BD 3100 bytes
font_02_sfnt_off0000a026.bin
6715da9af1f5aaa20efc7c5cebaf2a7cf9291b43b5036f803d0564ac91631784
pdf-font-stream PDF embedded font (sfnt) at offset 0xA026 16464 bytes