Malicious PDF — malware analysis report

Static analysis result for SHA-256 616566ff2a556e7f…

MALICIOUS

PDF

22.4 KB Created: 2019-05-07 04:56:30 +01:00 Authoring application: mPDF 5.7
MD5: 8edb153b9b1acf4c31b66c106bef58f0 SHA-1: 0ce06a36a6ed0113dd9ea138c78aaf91d8ee4308 SHA-256: 616566ff2a556e7f2cc2886ff77314cec97d53bf21f53d29a1e0bb53f11f94cc
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, identified by the PDF_SEO_LINK_FARM heuristic. While the URLs themselves are labeled as benign, the sheer volume and the nature of the heuristic suggest a malicious intent, possibly for SEO manipulation or to distribute further malicious content. No scripts were extracted from this sample, but the embedded links are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9903

Heuristics 2

  • 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://xiixmcuin.linkpc.net/1204203204202200/When-Affirmative-Action-Was-White-An-Untold-History-of-Racial-Inequality-in-Twentieth-Century-America-by-Ira-Katznelson.pdf
    • http://xiixmcuin.linkpc.net/3208205206208209/The-Oxford-History-of-the-British-Empire-Volume-IV-The-Twentieth-Century-Twentieth-Century-Vol-4-by-Judith-M-Brown.pdf
    • http://xiixmcuin.linkpc.net/2203207204206207/A-History-Of-Affirmative-Action-1619-2000-by-Philip-F-Rubio.pdf
    • http://xiixmcuin.linkpc.net/4209202204206201/White-Trash-The-400-Year-Untold-History-of-Class-in-America-by-Nancy-Isenberg.pdf
    • http://xiixmcuin.linkpc.net/1205200207208203/London-in-the-Twentieth-Century-A-City-and-Its-People-by-Jerry-White.pdf
    • http://xiixmcuin.linkpc.net/1201200208204200204/The-Death-of-Affirmative-Action-by-John-A-Silvi.pdf
    • http://xiixmcuin.linkpc.net/1209200204204/The-Straight-State-Sexuality-and-Citizenship-in-Twentieth-Century-America-by-Margot-Canaday.pdf
    • http://xiixmcuin.linkpc.net/2203207200202205/Clinging-to-Mammy-The-Faithful-Slave-in-Twentieth-Century-America-by-Micki-McElya.pdf
    • http://xiixmcuin.linkpc.net/1200200204207200202/Twentieth-Century-World-History-by-William-J-Duiker.pdf
    • http://xiixmcuin.linkpc.net/1207202208208209/A-Chosen-Exile-A-History-of-Racial-Passing-in-America-by-Allyson-Hobbs.pdf
    • http://xiixmcuin.linkpc.net/1200202201209202203/The-Twentieth-Century-in-100-Moments-A-Visual-History-by-Akim-D-Reinhardt.pdf
    • http://xiixmcuin.linkpc.net/5201201207209202/Crabgrass-Crucible-Suburban-Nature-and-the-Rise-of-Environmentalism-in-Twentieth-Century-America-by-Christopher-Sellers.pdf
    • http://xiixmcuin.linkpc.net/1200200203203200203/The-Sunday-Times-Illustrated-History-of-Twentieth-Century-Sport-by-Chris-Nawrat.pdf
    • http://xiixmcuin.linkpc.net/8205206209208204/The-Devil-in-History-Communism-Fascism-and-Some-Lessons-of-the-Twentieth-Century-by-Vladimir-Tism-neanu.pdf
    • http://xiixmcuin.linkpc.net/2203208202202209/Bachelor-Girl-The-Secret-History-of-Single-Women-in-the-Twentieth-Century-by-Betsy-Israel.pdf
    • http://xiixmcuin.linkpc.net/2208202209208/Heroic-Mexico-The-Narrative-History-of-a-Twentieth-Century-Revolution-by-William-Weber-Johnson.pdf
    • http://xiixmcuin.linkpc.net/4207208207207203/Just-Medicine-A-Cure-for-Racial-Inequality-in-American-Health-Care-by-Dayna-Matthew.pdf
    • http://xiixmcuin.linkpc.net/1206205202201206/A-History-of-Histories-Epics-Chronicles-Romances-and-Inquiries-from-Herodotus-and-Thucydides-to-the-Twentieth-Century-by-J-W-Burrow.pdf
    • http://xiixmcuin.linkpc.net/2205208205201206/White-Cargo-The-Forgotten-History-of-Britain-s-White-Slaves-in-America-by-Don-Jordan.pdf
    • http://xiixmcuin.linkpc.net/9207203208200207/Who-Discovered-America-The-Untold-History-of-the-Peopling-of-the-Americas-by-Gavin-Menzies.pdf