Malicious PDF — malware analysis report

Static analysis result for SHA-256 515adffebbd8d18c…

MALICIOUS

PDF

123.7 KB Created: 2021-03-21 05:01:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e07708aa29237af1cafbc703e3caac7a SHA-1: 571734e1b0079267a486899332e4206c0583b3c3 SHA-256: 515adffebbd8d18c84751f1fdf0bc11e1e34a5ec53979e5b1b0f1550dd79740c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The embedded URL 'https://pelibifir.ru/award?keyword=bijection+definition+pdf' further supports this, as it directs users to a site that likely hosts malicious content or phishing pages. While no scripts were explicitly extracted, the nature of the PDF and its numerous external links strongly indicate a malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9643

Heuristics 5

  • 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-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://pelibifir.ru/award?keyword=bijection+definition+pdf
    • https://cdn-cms.f-static.net/uploads/4485695/normal_5fdb92181c96f.pdf
    • https://cdn.sqhk.co/rigizisojix/77hije6/barbie_dreamhouse_adventures_character_quiz.pdf
    • https://pulimogub.weebly.com/uploads/1/3/4/3/134312020/5c65af8f288.pdf
    • https://static.s123-cdn-static.com/uploads/4408001/normal_5fecd2ca1ca6e.pdf
    • http://hytri.com/cissp_all-in-one_exam_guide_6th_editionplfzq.pdf
    • https://cdn-cms.f-static.net/uploads/4467589/normal_600bd823c12d8.pdf
    • http://supfitket.buzz/photography_quotation_format5ffof.pdf
    • https://cdn-cms.f-static.net/uploads/4384310/normal_6017e153cc4b0.pdf
    • https://cdn.sqhk.co/mekekomubun/9QWjcgc/wifi_password_recovery_pro_apk_download.pdf
    • https://cdn.sqhk.co/zeliravepuj/iIGlCVn/skate_racing_apk.pdf
    • https://luzulobopado.weebly.com/uploads/1/3/2/6/132681737/983844239.pdf
    • https://cdn.sqhk.co/donaxewon/jchehid/phoenix_suns_girl_name.pdf
    • https://cdn.sqhk.co/kigaratak/hfGhgWv/wallpaper_billie_eilish_2020.pdf
    • http://goldenframecollision.com/bobupusowazit7n2s.pdf
    • https://nukanepinax.weebly.com/uploads/1/3/1/4/131454046/5e7a8c6e97f7.pdf
    • http://gvidilon.ru/duxamoboluwekuz10a0g.pdf
    • http://veronaital.space/how_much_does_cost_to_rebuild_a_transmissionswp3x.pdf
    • https://molisepav.weebly.com/uploads/1/3/5/3/135347716/miwoki.pdf
    • https://cdn.sqhk.co/bulamije/hfGhchf/red_rose_movie_2017_download.pdf
    • https://cdn.sqhk.co/nivunufozub/hc2voab/free_printable_wheels_on_the_bus_book.pdf
    • https://sevogumomupu.weebly.com/uploads/1/3/4/0/134018352/mixulesew.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://www.opentle.org
    • https://s3.amazonaws.com/xonobijikivo/mavebonipor.pdf
    • https://s3.amazonaws.com/remeranexe/periodontitis_apical_asintomatica.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 10

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_011_off0001b22e.bin
c9150f2e9ec78f6ff313de46a7bd6b7484db1e3a41738eb944b1f0816c3996ea
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1B22E 18684 bytes
font_00_sfnt_off000116fd.bin
caeed39893b82969c26dfcac95946a3fad4fbae0765b3ea81aa15456cfe783a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x116FD 5684 bytes
font_01_sfnt_off00012ad8.bin
082801cf22f15abab10e2d1780b79d2c7a9a0b529af7b17d2aac34b7b7feef85
pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD8 4756 bytes
font_02_sfnt_off00013b2c.bin
1620336da6018abf771a3b64a4739dbc5cc5761e5bcfd31f9568e9163b5e6178
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B2C 2656 bytes
font_03_sfnt_off00014631.bin
14c09dfb153afc154e44083bd7584a75bb9e8754549abcf202bb1a7a7d928d8a
pdf-font-stream PDF embedded font (sfnt) at offset 0x14631 9040 bytes
font_04_sfnt_off0001586b.bin
6d897259d7ab9db79b0dbb16904cd99ff486aa7f4a475590a5d3e44eab6e0eed
pdf-font-stream PDF embedded font (sfnt) at offset 0x1586B 2328 bytes
font_05_sfnt_off00016321.bin
b3976ad28991401f3a7e0d936621f3963ed8fd81aff5bedc9e25cf6548b1959b
pdf-font-stream PDF embedded font (sfnt) at offset 0x16321 2108 bytes
font_06_sfnt_off00016cec.bin
c8cb303e765c67f43d6d34f29c1d02953890772ff7b697be779fb29335000f72
pdf-font-stream PDF embedded font (sfnt) at offset 0x16CEC 6640 bytes
font_07_sfnt_off00017e8c.bin
9ee77ae3fbc2973656cadb83517827189e362088fa958652cf9e277c96759b92
pdf-font-stream PDF embedded font (sfnt) at offset 0x17E8C 16892 bytes
font_09_sfnt_off0001d0c3.bin
333cf0bae5291019b79d77a37696b89786718dc77a0e6f1c7356514a48765311
pdf-font-stream PDF embedded font (sfnt) at offset 0x1D0C3 3276 bytes