Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d49057cccc80fd7…

MALICIOUS

PDF

32.0 KB Created: 2020-08-15 15:23:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4513e90f8ebe4dd6517bcef66a218d2c SHA-1: fef906a2b70b622965c7e2a53b1921fc853189f7 SHA-256: 5d49057cccc80fd7ff382235fff6a74e7f0004102ab7343e4a91306fff03b161
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, disguised as a visa application form. The PDF also hosts a large number of external links, many of which point to potentially malicious content. The ML classifier strongly indicated maliciousness, supporting the conclusion that this document is part of a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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 https://ttraff.com/wb?keyword=visa%20application%20form%20people
    • http://teguwipow.kaliaofelenite.com/uploads/1/3/0/7/130738667/6d129d34f1.pdf
    • http://files.the-trade-depot.com/uploads/1/3/0/8/130874575/3369454.pdf
    • http://rapisujan.passivehabits.com/uploads/1/3/2/3/132302720/ab76593.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/1339/7913/files/28410762353.pdf
    • https://cdn.shopify.com/s/files/1/0429/6415/6582/files/ignou_bsc_mathematics_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0438/9984/6824/files/71317486875.pdf
    • https://cdn.shopify.com/s/files/1/0439/2907/5880/files/fractions_in_java.pdf
    • https://cdn.shopify.com/s/files/1/0431/2078/7613/files/vejitetetozipevebigogase.pdf
    • https://cdn.shopify.com/s/files/1/0431/3461/5706/files/limawafilezuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71409998288.pdf
    • https://cdn.shopify.com/s/files/1/0436/8993/5003/files/via_aerobica_y_anaerobica.pdf
    • https://cdn.shopify.com/s/files/1/0430/4191/5042/files/bup_admission_test_question_bank.pdf
    • https://cdn.shopify.com/s/files/1/0427/5778/3718/files/53690995264.pdf
    • https://cdn.shopify.com/s/files/1/0432/8521/7436/files/67231149527.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/sekesetolunalezalore.pdf
    • https://cdn.shopify.com/s/files/1/0431/0210/9856/files/32862763496.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004226.bin
ab09a3a690d945f3e2b26f809ad90c421609c81e9f177d0d2a63429685e8bb98
pdf-font-stream PDF embedded font (sfnt) at offset 0x4226 5536 bytes
font_01_sfnt_off000054bd.bin
d4f780532ea9d5556bf765d9aaf66d578fd63a1e98a79b2bb49fcf315c959a44
pdf-font-stream PDF embedded font (sfnt) at offset 0x54BD 8800 bytes