Malicious PDF — malware analysis report

Static analysis result for SHA-256 6180a2c03c84dccd…

MALICIOUS

PDF

68.5 KB Created: 2020-08-08 21:34:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2932696e877ec52df5d3183a6fdb5804 SHA-1: 79d9fae3eeaed83d0e5d7c0e8db218464ffb9769 SHA-256: 6180a2c03c84dccd1edf4923c830c90239927b3c58833eaec9788f1f58cd3608
162 Risk Score

Malware Insights

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

The PDF contains numerous links, including one identified as a malicious redirector, leading to a page related to 'nios assignment front page in tamil pdf'. This suggests a phishing or scam attempt to trick users into downloading potentially malicious content. The presence of a "download button" heuristic further supports this, indicating a lure for user interaction. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=nios+assignment+front+page+in+tamil+pdf
    • http://putasuwur.drgarygoodman.com/uploads/1/3/2/6/132681946/3510140.pdf
    • http://files.therockwm.com/uploads/1/3/1/4/131453350/537642.pdf
    • http://files.crisiscontrolsolutions.com/uploads/1/3/0/7/130739489/9700341.pdf
    • http://files.creativeescapeworkshops.com/uploads/1/3/0/9/130969169/xufazamur.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://www.indictrans.org
    • https://cdn.shopify.com/s/files/1/0440/8590/3525/files/gikadekutoma.pdf
    • https://cdn.shopify.com/s/files/1/0437/8093/1733/files/26287910643.pdf
    • https://cdn.shopify.com/s/files/1/0428/0333/1231/files/87247465051.pdf
    • https://cdn.shopify.com/s/files/1/0433/3525/4171/files/68929093171.pdf
    • https://cdn.shopify.com/s/files/1/0432/8390/6724/files/hacking_the_caged_system_book_1.pdf
    • https://cdn.shopify.com/s/files/1/0435/6331/9445/files/arthashastra_book_in_tamil_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/9166/5830/files/93342443929.pdf
    • https://cdn.shopify.com/s/files/1/0431/3962/9218/files/976308374.pdf
    • https://cdn.shopify.com/s/files/1/0436/9665/2443/files/geometric_design_of_highways_examples.pdf
    • https://cdn.shopify.com/s/files/1/0440/7466/4086/files/saints_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0429/9105/9097/files/bomasepifexakixegofu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9708/7390/files/bibafulanemeraxabuzo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rinavupomun.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://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 10

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cfe.bin
a68a53968c1cd5e5286d06248739bdef2bee446a4fefd91bcc29d5c207854dfa
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CFE 5328 bytes
font_01_sfnt_off00006f0c.bin
c206ac4eca120f096112d408dff6b33a2f721090936d80486df636e1cd240fde
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F0C 2656 bytes
font_02_sfnt_off00007a10.bin
658369fdf4dbfcc549ff0dbb011939356d60280aa168350d25aadc0d5ebdd447
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A10 4944 bytes
font_03_sfnt_off00008a28.bin
3702365b3034b9d7945da23b991b5e2ac3f8bb06d1ba3be7e5ba1b5d8dd48c9f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A28 2328 bytes
font_04_sfnt_off000094df.bin
e66bd646ff29f48b94a898642357a1d5295b77faffa0bd70eb77acb4aebc9a97
pdf-font-stream PDF embedded font (sfnt) at offset 0x94DF 2108 bytes
font_05_sfnt_off00009eb5.bin
7f3a1ef136f36ba68bc36e5bcd31de243dce7f4b60e01c4bc40f508baeb48ca0
pdf-font-stream PDF embedded font (sfnt) at offset 0x9EB5 2604 bytes
font_06_sfnt_off0000a9cf.bin
87016e8933cc862d1d188edfbee698abcff8178ed3d6b510b61737ee02f60284
pdf-font-stream PDF embedded font (sfnt) at offset 0xA9CF 4336 bytes
font_07_sfnt_off0000b770.bin
9790927e219d744867132f116e4236948011b7c356f610d8bb967db6f4cff1fe
pdf-font-stream PDF embedded font (sfnt) at offset 0xB770 10152 bytes
font_08_sfnt_off0000da55.bin
87b11184b5fb382926058b62571af46aa6dbfb48f25dd730750aae8b36686012
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA55 8232 bytes
font_09_sfnt_off0000f5bf.bin
c4869f4910101e9de114603d80c87e7465cc14a3edf423f39a6ef78b10429b6f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BF 2608 bytes