Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b86823678167040…

MALICIOUS

PDF

49.9 KB Created: 2020-08-12 03:34:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd4758b25b6e904c5be153690b98b6cc SHA-1: 0dd4131ca454291a363e5070cf8e01b35770cfcf SHA-256: 7b8682367816704070c9d86efbba6847e61e35aaca69acc6404789ac89a02796
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Forensic pharmacy by b suresh pdf' and the malicious URL, suggesting a lure to a phishing or scam page. The ML classifier also strongly indicated maliciousness.

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=forensic%20pharmacy%20by%20b%20suresh%20pdf
    • http://files.sculptingstudiopilates.com/uploads/1/3/0/7/130738739/32f3ff721ae80.pdf
    • http://files.lakeodessaarts.com/uploads/1/3/1/4/131454850/e5c64fada536.pdf
    • http://files.writeproject.org/uploads/1/3/0/8/130874097/5587091.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/0864/7580/files/kijatuwexikul.pdf
    • https://cdn.shopify.com/s/files/1/0431/6548/3168/files/44403186782.pdf
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/93661060004.pdf
    • https://cdn.shopify.com/s/files/1/0437/7097/0274/files/convert_to_word_using_apache_poi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9878/3382/files/vejofe.pdf
    • https://cdn.shopify.com/s/files/1/0436/0021/6232/files/bovivoj.pdf
    • https://cdn.shopify.com/s/files/1/0446/0825/8211/files/data_structures_and_algorithms_in_python_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0429/2093/5590/files/zexexitemafavetige.pdf
    • https://cdn.shopify.com/s/files/1/0430/5390/8117/files/30207121445.pdf
    • https://cdn.shopify.com/s/files/1/0438/1766/4674/files/26869061609.pdf
    • https://cdn.shopify.com/s/files/1/0438/8113/6296/files/free_email_notification_sound.pdf
    • https://cdn.shopify.com/s/files/1/0432/9704/6696/files/jogopanubod.pdf
    • https://cdn.shopify.com/s/files/1/0435/2576/7320/files/59092179664.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000543f.bin
7e4918c80e89c19515542be682beb49b6535ac4b2c177bbee56431288b5c4c2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x543F 5360 bytes
font_01_sfnt_off0000663e.bin
6dc4acc210bc8a6ab159bc36a7fa7061a2e0c1a14c8a092ac0933bfb159419c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x663E 15000 bytes
font_02_sfnt_off00009572.bin
5dc9ed390f12ed626cc6b7d34b48072e742e77445905164704ef3766ecb6c898		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9572 16164 bytes
font_03_sfnt_off0000aa88.bin
ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA88 4324 bytes

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