Malicious PDF — malware analysis report

Static analysis result for SHA-256 611ea255f41de64d…

MALICIOUS

PDF

53.5 KB Created: 2020-08-11 00:07:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d850f662533fa4eaf9f80142c766edeb SHA-1: 4dc7bd9d21ce1cd2904cc8877d809b30bb32a811 SHA-256: 611ea255f41de64d9a1218c67e4e2eeb075901f1b8b2ec6ea97659a80ea7c05d
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 bank loan application form. The document body and embedded URLs indicate a lure to external, potentially malicious, content. The presence of numerous external PDF links suggests a link farm or SEO poisoning tactic to distribute malicious content.

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.cc/pify?keyword=mudra+bank+loan+application+form+sbi+pdf
    • http://files.carolinedempseyartist.com/uploads/1/3/0/7/130740517/c4df59aedf56d.pdf
    • http://files.reddevilsalumni.com/uploads/1/3/1/3/131382395/giwosiz_jivilupoj.pdf
    • http://files.adamsienk.com/uploads/1/3/0/9/130968917/mimono.pdf
    • http://files.brittanyschmutzler.com/uploads/1/3/1/4/131453522/6493719.pdf
    • http://tifubes.solidmetrology.com/uploads/1/3/0/8/130874330/a729b4360f8d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1796/0604/files/how_many_months_is_weeks.pdf
    • https://cdn.shopify.com/s/files/1/0433/7922/8837/files/11729180812.pdf
    • https://cdn.shopify.com/s/files/1/0428/9911/2095/files/63299454603.pdf
    • https://cdn.shopify.com/s/files/1/0440/4166/6710/files/runafevuwuda.pdf
    • https://cdn.shopify.com/s/files/1/0430/9365/5716/files/assessment_student_learning_module.pdf
    • https://cdn.shopify.com/s/files/1/0428/4160/4263/files/95250023069.pdf
    • https://cdn.shopify.com/s/files/1/0435/8488/0798/files/every_nba_team.pdf
    • https://cdn.shopify.com/s/files/1/0428/7892/7014/files/xufimivajebasezuxofaki.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5502/files/pewixozuzobupakepa.pdf
    • https://cdn.shopify.com/s/files/1/0433/7342/8888/files/fasilegosiwapasivi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0292/0086/files/antigeno_prostatico.pdf
    • https://cdn.shopify.com/s/files/1/0435/5109/6993/files/6766683632.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ca2.bin
7d7f66229ab45dc37d0202647a34825bd813b0a2250a06c2c39010e330b52c90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CA2 5508 bytes
font_01_sfnt_off00008f47.bin
7850eb1c8bb3c3e3337f746f125c146608f0ccf9772acf82a146e3684697d7b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F47 10516 bytes
font_02_sfnt_off0000b333.bin
ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB333 16164 bytes

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