Malicious PDF — malware analysis report

Static analysis result for SHA-256 98b4d63823ad729e…

MALICIOUS

PDF

69.9 KB Created: 2021-03-13 16:14:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a41e4d353d256aa1f57fb016ab4697e1 SHA-1: dabaead0a9a1be32ffdb961f0c68f5e4b32000d2 SHA-256: 98b4d63823ad729e60911960660a05849ed5d0201daa0fa3a99f95227543fd7d
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URL that is likely used for phishing or to download a secondary payload. The document body, though heavily obfuscated, suggests a lure related to 'Biblical allusions worksheet answers', indicating a social engineering tactic to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/wix?keyword=biblical+allusions+worksheet+answers
    • http://makamar.tech/suvatasofipusfm51y.pdf
    • https://cdn.sqhk.co/kasunelebak/hgrSHKy/12434011646.pdf
    • http://lomigakorak.getenjoyment.net/safe_haven_animal_rescue_lafayette_la.pdf
    • http://goproonly.com/harry_potter_order_of_the_phoenix_game_ps2_talking_gargoyleskp110.pdf
    • http://kawafopi.mygamesonline.org/faringitis_gonoccica.pdf
    • https://cdn.sqhk.co/foropogajag/sWjhjHM/police_scanner_codes_oregon.pdf
    • http://xilenemivagola.mywebcommunity.org/duralast_jump_starter_700_charging_cord.pdf
    • https://cdn.sqhk.co/kafevinuva/dBghico/second_hand_dog_runs_for_sale_ireland.pdf
    • http://fertpin.online/gareroritifonabadorepspm4p.pdf
    • https://cdn.sqhk.co/lupobikud/sieBjgI/viticulture_tuscany_review.pdf
    • http://gadetebes.sportsontheweb.net/after_book_series_movie.pdf
    • https://cdn.sqhk.co/wesuwajil/JGhceAJ/khan_academy_answer_key_algebra_1.pdf
    • http://xubanapirobula.mypressonline.com/how_to_create_an_online_shop_on_wix.pdf
    • http://wovewor.iblogger.org/borewixisasupokidol.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tezofuretejom/dogodiruvomejowoki.pdf
    • http://nanesipub.rf.gd/properties_of_parallel_and_perpendicular_lines_worksheet.pdf
    • http://didazejitikav.rf.gd/67850946669.pdf
    • https://s3.amazonaws.com/dovulavavo/97811100263.pdf
    • https://s3.amazonaws.com/niwotipugonuvoz/ultrasound_guided_supraclavicular_nerve_block_sonosite.pdf
    • http://zazadizowemizus.rf.gd/tilivigoj.pdf
    • http://kupemamenigasi.rf.gd/30449977974.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d318.bin
5a3e790f454bba0f9c0a36ffc56086f495f35f876fb123834e0ec826de08b86b
pdf-font-stream PDF embedded font (sfnt) at offset 0xD318 5232 bytes
font_01_sfnt_off0000e4f1.bin
cc68e166c2b3987b2dac1ff3782e9502eaef03664b37fddae69be6d07f6503a8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F1 11060 bytes