Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5b28c2e00093d8e…

MALICIOUS

PDF

122.1 KB Authoring application: Smallpdf Desktop
MD5: c4a19a75d0881784fe4c6c753bc47ecc SHA-1: 8374d395891e86768c7087720bee5ad0f33a0354 SHA-256: a5b28c2e00093d8e952be3a18c9484a391f216590b5e71b517a2caf1713057a7
160 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM', suggesting a tactic to distribute further malicious content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document may be part of a multi-stage attack, potentially using a password to bypass initial security scans. ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further confirms malicious intent, likely related to phishing or malware distribution.

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://zamapag.ecoopower.com/uploads/2020/01/27/a1bb6.pdf
    • http://nosborne.com/uploads/1/3/0/5/130590298/6721321.pdf
    • http://apollo1firenhd.com/uploads/1/3/0/4/130435690/f9816068.pdf
    • http://mafawodel.remont-apple1.icu/uploads/2020/01/28/1017839.pdf
    • http://xaz.toschevikova.com/uploads/2020/01/28/lipububeb.pdf
    • http://bigblockgaragexjs.com/uploads/1/3/0/3/130323914/fuvuwomoxe_tivog_vakofikibimor.pdf
    • http://fimi.inity420.com/uploads/2020/01/28/5371112.pdf
    • http://tefanil.rusgame.pw/uploads/2020/01/27/bdcbd9.pdf
    • https://rugoxewuf.weebly.com/uploads/1/3/0/5/130551041/2435620.pdf
    • http://journeytosimplicity.org/uploads/1/3/0/2/130274349/vuzejonapovuriwuka.pdf
    • http://len.redping.ru/uploads/2020/01/27/4539270.pdf
    • http://360kirk.com/uploads/1/3/0/5/130590477/2842873.pdf
    • http://alabamaassure.com/uploads/1/3/0/2/130289385/ravexalabegurelek.pdf
    • http://unifiedbuild.com/uploads/1/3/0/5/130539990/pometutupatuwi.pdf
    • http://thesingbabysingshow.com/uploads/1/3/0/2/130273944/130273944.html#european+occupational+exposure+limits

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000152d.bin
3e6abe185f0f6a04a9ae116e0c258b9f6f1b3e41a3acf8f39b62ab668af5dbd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x152D 9480 bytes
font_01_sfnt_off0001089e.bin
bcac0042b46fd783faa5fdaa69d7f3f94b46cad0b504842c0cb8a1e14d61c3be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1089E 16160 bytes
font_02_sfnt_off0001a84b.bin
63f5e27ee3d24cc00d413e59c301cc73ab377383609796993547673f2bea898c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A84B 2600 bytes

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