Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b0da3dffe60a4f0…

MALICIOUS

PDF

40.7 KB Authoring application: pdf-parser First seen: 2020-09-15
MD5: 7f5df786b30ab5efb0a984e8bf359e11 SHA-1: 4e41150ce5b3080d68b6349a2310a925322ef764 SHA-256: 3b0da3dffe60a4f083fa8b74c29b5dd3e7ff037d2e665aadb273a0916c6a4d84
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of embedded links to external PDF documents hosted on various domains. This behavior is indicative of a link farm designed to direct users to potentially malicious content, as suggested by the ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0'. The primary heuristic 'PDF_SEO_LINK_FARM' confirms the presence of numerous external links, with the first being http://konuvubedo.morby.icu/uploads/2020/01/28/2134768.pdf. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • 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://konuvubedo.morby.icu/uploads/2020/01/28/2134768.pdf In PDF document text
    • http://naillogicinstitute.com/uploads/1/3/0/5/130550873/vosidivuv.pdfIn PDF document text
    • http://gumub.legitimateparttimeworkfromhome.com/uploads/2020/01/27/5179049.pdfIn PDF document text
    • http://turomuvezi.zeeshanbuilds.site/uploads/2020/01/27/lugisowobo.pdfIn PDF document text
    • http://baymediaproductions.com/uploads/1/3/0/6/130639535/dugur.pdfIn PDF document text
    • http://coreenergycleansing.com/uploads/1/3/0/6/130603822/a6d5109.pdfIn PDF document text
    • http://yhgjylcvnsb.weebly.com/uploads/1/3/0/6/130620272/tariworamuwug.pdfIn PDF document text
    • http://teamempoweringtogether.com/uploads/1/3/0/2/130271165/4329249.pdfIn PDF document text
    • http://kurthindustries.com/uploads/1/3/0/4/130489265/66db3af3c1ae.pdfIn PDF document text
    • http://tapthesky.org/uploads/1/3/0/6/130620202/tikuvu_natemajaz.pdfIn PDF document text
    • http://wemidenoji.maisfutebol.online/uploads/2020/01/28/pamojow.pdfIn PDF document text
    • http://ptxsynchro.org/uploads/1/3/0/5/130590054/37bedd64f55f.pdfIn PDF document text
    • https://nukibuvub.weebly.com/uploads/1/3/0/4/130478433/bevawilo.pdfIn PDF document text
    • https://basisawesamegen.weebly.com/uploads/1/3/0/4/130476814/jinukuvub-zopon-tipixaxujuk.pdfIn PDF document text
    • http://jokofijo.tomatis-siberia.ru/uploads/2020/01/27/buxipexafafewabuj.pdfIn PDF document text
    • http://mesys-industrial.net/uploads/1/3/0/6/130621651/4797670.pdfIn PDF document text
    • https://gujetokoje.weebly.com/uploads/1/3/0/2/130270937/jawelobuxo.pdfIn PDF document text
    • http://matsuwholesale.com/uploads/1/3/0/4/130483856/vodima.pdfIn PDF document text
    • http://loilyyoursessentials.com/uploads/1/3/0/2/130292143/9087043.pdfIn PDF document text
    • http://advokat-33.com/uploads/2020/01/28/sededanupolezax_terabirewafol.pdfIn PDF document text
    • http://bctee.com/uploads/1/3/0/2/130287246/zutogegafafisak-silitakafo.pdfIn PDF document text
    • http://romanacoutureshop.com/uploads/1/3/0/5/130539247/130539247.html#ashampoo+pdf+free+kluczIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1649 8252 bytes
SHA-256: 512073f4f87ca2939a4c083564a95f4d901f3e3835c0dd9160f7f78173cfce6a

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