Malicious PDF — malware analysis report

Static analysis result for SHA-256 6244e2a8ddfa03e7…

MALICIOUS

PDF

73.9 KB Created: 2020-08-17 01:46:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3c31c6000c5f018d1d8de2b7ec22bff SHA-1: facc29a08036c5132f4cbeca402ae8417d7d9a02 SHA-256: 6244e2a8ddfa03e784643c8aa77afaf397a2551949db0daaffa3387fb92c49ea
170 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as an "ntpc admit card" and also functions as a link farm, pointing to numerous other PDFs. The ML classifier strongly indicated maliciousness, and the presence of a redirector URL suggests an attempt to lead the user to a malicious site. No scripts were extracted, but the document's structure and embedded links are indicative of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.com/pify?keyword=ntpc+admit+card++2019+chandigarh
    • http://files.helena-yang.com/uploads/1/3/1/4/131437443/begolipajeguf_jononevu.pdf
    • http://bikof.tackletwillpro.com/uploads/1/3/1/3/131384536/947d27ec4f836.pdf
    • http://files.appleridgecooperativehomes.com/uploads/1/3/0/7/130775848/tobuzozu-vagefag.pdf
    • http://files.citizensinsurancesolutions.com/uploads/1/3/2/6/132695329/xevege.pdf
    • http://files.cresteducator.com/uploads/1/3/0/8/130874160/7640449.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/0067/7031/files/software_for_data_analysis_chambers.pdf
    • https://cdn.shopify.com/s/files/1/0428/0755/8310/files/40990845774.pdf
    • https://cdn.shopify.com/s/files/1/0434/1347/1384/files/tovikolasu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0654/9406/files/dobikepol.pdf
    • https://cdn.shopify.com/s/files/1/0436/7620/5209/files/anemia_por_deficiencia_de_cido_flico.pdf
    • https://cdn.shopify.com/s/files/1/0432/7096/3350/files/71428365168.pdf
    • https://cdn.shopify.com/s/files/1/0428/6863/7862/files/hashimoto_s_diet.pdf
    • https://cdn.shopify.com/s/files/1/0435/0600/8216/files/zedutolofaralodog.pdf
    • https://cdn.shopify.com/s/files/1/0435/1649/3976/files/bijozokagaxazubi.pdf
    • https://cdn.shopify.com/s/files/1/0450/3139/1396/files/napovalopesejuxogadidog.pdf
    • https://cdn.shopify.com/s/files/1/0437/4344/5141/files/ebook_adobe_illustrator_bahasa_indonesia.pdf
    • https://cdn.shopify.com/s/files/1/0437/8935/3109/files/ww_monk_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/2390/9532/files/29338110508.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/gosokujubitedopikoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/5934/7618/files/banking_awareness_by_arihant_experts_free_download.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_off0000b3b0.bin
0eb3e156a026ea37c57cc98e5bdf96e21167704ff7f8f30e1627e411273f70d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3B0 5288 bytes
font_01_sfnt_off0000c57f.bin
1b008c77d0882c4e0cc8e6e5e0a54f5a89a7893cef1bdde517a2e838cff22cce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC57F 15124 bytes
font_02_sfnt_off0000f41c.bin
d6aeca2d71d065aeba00d03c50d672d3ba05f186ce264dc70760bb3990d11dd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF41C 16632 bytes
font_03_sfnt_off00010b2d.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2D 4324 bytes

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