Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a11e756aca680ae…

MALICIOUS

PDF

155.3 KB Created: 2021-01-15 05:41:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 67e7c000b983df7452335743b2748416 SHA-1: dfcab12100f83d4c9b3b2682c98b0e80ce4313cb SHA-256: 2a11e756aca680ae6fc5e0554bd854538e90ee26db2c086fd47b172548397eb4
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier. It contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure (ggtraff.ru). The document appears to be a link farm designed to lure users to external sites, likely for phishing or malware distribution. No scripts were extracted, but the presence of malicious links is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ggtraff.ru/123?utm_term=chinese+ice+dragon In PDF document text
    • https://cdn.sqhk.co/raninogozo/mvjbD0y/snake_in_the_grass_meaning_marathi.pdfIn PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/5914061.pdfIn PDF document text
    • https://site-1175531.mozfiles.com/files/1175531/narasimham_malayalam_movie_bgm.pdfIn PDF document text
    • https://gesurori.weebly.com/uploads/1/3/4/3/134353915/756164.pdfIn PDF document text
    • https://podozipejubepa.weebly.com/uploads/1/3/4/8/134893890/zakulopedomig.pdfIn PDF document text
    • https://wedemewimobuxet.weebly.com/uploads/1/3/4/3/134309086/vunip.pdfIn PDF document text
    • https://fiwixenolo.weebly.com/uploads/1/3/4/4/134493020/xubesowaka.pdfIn PDF document text
    • https://bijigixeze.weebly.com/uploads/1/3/0/7/130739450/seruzomumolugiz.pdfIn PDF document text
    • https://cdn.sqhk.co/gisusisabez/aUCifjd/zexakubez.pdfIn PDF document text
    • https://vodazifuja.weebly.com/uploads/1/3/4/2/134265633/kaxivajinawabez.pdfIn PDF document text
    • https://site-1175941.mozfiles.com/files/1175941/dumujesidokozuva.pdfIn PDF document text
    • https://bexalasavego.weebly.com/uploads/1/3/4/6/134650617/nogisogupivigupaka.pdfIn PDF document text
    • https://koxoganonigowup.weebly.com/uploads/1/3/1/4/131408343/7481487.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fazujo/bajrangi_songs_kannadamasti.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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000174b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174B1 52064 bytes
SHA-256: 53b60df2c6e5aa6ec5be448160afc51d5303b489a9c2f383907895c186f756aa
font_01_sfnt_off00020ff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20FF2 5076 bytes
SHA-256: f8fd4a2d29a16d9ffc2735d3ea8087ee7f1811c3f0fd435c9752f208e3448966
font_02_sfnt_off00022122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22122 13520 bytes
SHA-256: 1db139a1986230dc2996b83137bf0421b5c8f0b219f453cdb18aaaf1111db8d7
font_03_sfnt_off00024b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24B1D 16028 bytes
SHA-256: ced8b21f0c91c47eb2a8e10a251844195ecd6fd413d2ce9a64032c85f057f195

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