Malicious PDF — malware analysis report

Static analysis result for SHA-256 19f5dcb969295ac4…

MALICIOUS

PDF

98.4 KB Created: 2021-04-01 14:40:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01e944766506962619633e04b7894110 SHA-1: 29a572f7077c40b9cce1fd0a138ed9a81fdc41cc SHA-256: 19f5dcb969295ac4c96dbdc4b2c23e2408f54fffd262297476fe728c80d2c772
164 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or malware distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, suggesting an attempt to direct users to various malicious sites. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://bologen.ru/award?keyword=anganwadi+form+bihar+pdf
    • http://trickyturkey.com/zorinuwudulak67bpz.pdf
    • https://neruwutuwi.weebly.com/uploads/1/3/5/9/135960217/begipubifugufo.pdf
    • https://cdn.sqhk.co/vuxesojogugu/fkjdbjh/pet_paradise_resort_houston_will_clayton_humble_tx.pdf
    • https://cdn.sqhk.co/guzikiku/hZLifGH/33876520958.pdf
    • http://hamsterbig.com/623719811767elv9.pdf
    • https://wimetuzozafod.weebly.com/uploads/1/3/4/6/134604259/7890178.pdf
    • https://kakagigaj.weebly.com/uploads/1/3/4/6/134684555/texilikuweposoja.pdf
    • https://cdn.sqhk.co/kavejufa/hhpCMzj/draw_line_in_ms_word_2007.pdf
    • https://cdn.sqhk.co/woxekivepi/pMhdghK/12718366684.pdf
    • https://masudokunu.weebly.com/uploads/1/3/4/7/134731157/lubuxaminofiti_tifuwafesafuju.pdf
    • https://jamakebowixon.weebly.com/uploads/1/3/4/4/134477175/divodapaf-wumexomi-kivov.pdf
    • https://cdn.sqhk.co/jukelifawap/f04ighg/81942358944.pdf
    • https://cdn.sqhk.co/tinolaseja/getyAjd/wuzubapo.pdf
    • https://cdn.sqhk.co/zovigobut/hdJSgi5/24701863301.pdf
    • https://cdn.sqhk.co/sunidoxil/Li7hblU/fruit_slice_master_mod_apk_android_1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://pineduvo.rf.gd/motorola_mc5590_scanner.pdf
    • https://uploads.strikinglycdn.com/files/46bb31f9-b9d9-4155-9bca-b26a9129808c/2003_jeep_liberty_sport_wheel_size.pdf
    • https://uploads.strikinglycdn.com/files/89e01a20-d7ad-4294-96bb-6afede3e64a9/which_vacuum_is_better_shark_or_eureka.pdf
    • http://dabevejef.rf.gd/18667460192.pdf
    • http://fagesoletenuku.rf.gd/how_to_write_books_and_sell_on_amazon.pdf
    • https://uploads.strikinglycdn.com/files/b9040fe0-980b-4da4-a5af-c8398f12ea43/all_souls_book_sparknotes.pdf
    • https://uploads.strikinglycdn.com/files/1ed5645c-f0d9-41cb-b260-34d6552d57e4/11189678468.pdf
    • https://uploads.strikinglycdn.com/files/8709764b-8a22-4f03-9751-cae6a45c5ec5/distinguish_between_n_type_and_p_type_semiconductor_on_the_basis_of_energy_band_diagram.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_off000105ea.bin
83481b768ac391bdb5a5b1da6bda7bc853e3222080dbb5b842875270db13b217		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105EA 5468 bytes
font_01_sfnt_off00011867.bin
b81a46982d9892df499fe568bc01b5d0ffeaf2ee3a616979e18596c4bc2d813c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11867 11020 bytes
font_02_sfnt_off00013e25.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13E25 16204 bytes
font_03_sfnt_off00015390.bin
2f950983a96f67ea4efeef5502c1855230a928863ed3ddc1f1042cbd0e8100e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15390 13216 bytes

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