Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b73a06ac30d031d…

MALICIOUS

PDF

138.4 KB Created: 2021-02-23 02:57:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 68bae66f06be622fe4e2bb169003e5c1 SHA-1: 7bb38761df4a9c625ed00e12514af6fb9db0eb7a SHA-256: 4b73a06ac30d031d835d17ae42d8d5c4933904bd4586d2728bc338e65a393ee7
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical finding for a PDF link farm and ClamAV detection as a phishing trojan. The presence of embedded URLs, particularly the one pointing to 'bologen.ru', suggests an attempt to redirect the user to a malicious site. While no scripts were explicitly extracted, the PDF structure and heuristics indicate a malicious intent to exploit users through deceptive links, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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/strik?utm_term=how+to+use+bluetooth+on+clarion+radio PDF link annotation
    • https://cdn.sqhk.co/rifojimuna/Eqgijad/itopya_musteri_hizmetleri_sikayet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374189/normal_5fdf28e8221cb.pdfIn PDF document text
    • https://cdn.sqhk.co/kimazibo/BpZhheb/lukiwaxafawasipoferine.pdfIn PDF document text
    • https://cdn.sqhk.co/fedelubu/ajbhbhb/tazotowetupawukepat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472501/normal_5ff1f78f27e17.pdfIn PDF document text
    • https://cdn.sqhk.co/zumufapofow/ASgg4hc/jafiwavanadefituru.pdfIn PDF document text
    • https://cdn.sqhk.co/sunawopi/nVjbcP4/naxobewe.pdfIn PDF document text
    • https://cdn.sqhk.co/kalusoxat/314Zihf/out_of_the_loop_epic_games_store.pdfIn PDF document text
    • https://cdn.sqhk.co/kezavilageg/9CjcTU4/1301008914.pdfIn PDF document text
    • https://cdn.sqhk.co/pozuwifofub/jejbgf0/jaxemojizofugolufixipu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417809/normal_600a85ab8f4a3.pdfIn PDF document text
    • https://cdn.sqhk.co/zogowefu/iigjigh/80061802853.pdfIn PDF document text
    • https://wixozini.weebly.com/uploads/1/3/4/3/134383912/5422036.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418968/normal_5ff03bd3e9e7a.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/battlefront_2_review_game_informer.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/ganale.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/62734275351.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/hypex_ucd180_datasheet.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001c7e4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1C7E4 14320 bytes
SHA-256: e5136e13070a9806a541784b087325f0279da6dd9cee465715201bc12414dae8
font_00_sfnt_off0001b62b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B62B 5220 bytes
SHA-256: aadf1e5055ffbb7834c1d59d1da37d9cf58a2c52246cef2a2f7dff3efc7a1622
font_02_sfnt_off0001eef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EEF9 12684 bytes
SHA-256: 4708eeed3deb1604d726b49174e0633a1acd7c46c45d5f956f0436923eb58d38

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