Malicious PDF — malware analysis report

Static analysis result for SHA-256 a88dbc0a73a4d820…

MALICIOUS

PDF

62.8 KB Authoring application: Karbon First seen: 2020-09-24
MD5: 04ab47058c8f54365607783464ce5e3e SHA-1: 3c3df93d4b4337d0734f971fca5925a4f789437a SHA-256: a88dbc0a73a4d8207997eafe179463698e5dafd89d90ef66b5d47114f0127119
152 Risk Score

Malware Insights

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

The PDF contains a link farm of external PDF files, disguised as a resource for English grammar books. This technique is commonly used to distribute malware or lead users to phishing sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 3

  • 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.
  • 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://doulajane.com/uploads/1/3/0/3/130379287/wezutuki.pdf In PDF document text
    • http://vectorservicesmn.com/uploads/1/3/0/4/130436093/2847138.pdfIn PDF document text
    • http://mistyislandbernese.com/uploads/1/3/0/6/130639861/82dd16.pdfIn PDF document text
    • http://beautybyellav.com/uploads/1/3/0/4/130435548/pedenibigup-dunivepa-megeseted.pdfIn PDF document text
    • http://newyearswim.co.uk/uploads/1/3/0/5/130589227/a5862a95544.pdfIn PDF document text
    • http://reelectjudgeericshepperd.org/uploads/1/3/0/4/130476468/rigifige.pdfIn PDF document text
    • http://thankheaven.com/uploads/1/3/0/7/130775826/pipixewuzediwur-badadafatatawut.pdfIn PDF document text
    • http://fenghuangtaiyangcheng.br3h.com/uploads/1/3/0/6/130639513/wujumaba.pdfIn PDF document text
    • http://pmehard.com/uploads/1/3/0/6/130620979/8457133.pdfIn PDF document text
    • http://anniebeg.com/uploads/1/3/0/6/130621195/pubotukif_vokidubisixoj_potumeju.pdfIn PDF document text
    • http://8ccer.bpmtc.com/uploads/1/3/0/8/130874278/130874278.html#best+english+grammar+books+pdf+downloadIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6947 1388 bytes
SHA-256: 1723f1ced37cc89d69e30f3df6281c5e5fb8989544fd4587aa75b00c91af2fd0
font_01_sfnt_off00007325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7325 15776 bytes
SHA-256: 30c0bcacc6b99cfa283ade5be9d4458afbce35a16c08b23f547fb45d393f63f6
font_02_sfnt_off00009fb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FB5 8444 bytes
SHA-256: b0dc3ca91d23e1a8c7ba61ee4a2e7f1cee62b2746fa39f9f94ccdd00c2a86955

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