Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f2dc09f831c3c94…

MALICIOUS

PDF

134.2 KB Created: 2021-03-28 18:56:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: aaee82de6f84531676640ebc0c04f976 SHA-1: 9146da1f3e9b7308b141faf9856643beb4ac66f0 SHA-256: 0f2dc09f831c3c9474f3fbb9184d0917f53dce30f7f6570e2c4c4239fc49c714
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://kuzutuzo.ru/strik?utm_term=chamberlain+whisper+drive+sensor+troubleshooting PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387054/normal_604ed6182cb24.pdfIn PDF document text
    • http://goldstein.berlin/50_shades_of_gray_cast_mrs_robinson43kqk.pdfIn PDF document text
    • http://wivikaxebox.medianewsonline.com/bible_quotes_about_spreading_the_good_news.pdfIn PDF document text
    • https://zitipijasidigor.weebly.com/uploads/1/3/0/8/130874434/400f9ef.pdfIn PDF document text
    • https://bozuwosumexoxal.weebly.com/uploads/1/3/2/6/132682772/3663508.pdfIn PDF document text
    • http://mists.space/genuzetozotuzogiguseribosfuxip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420013/normal_6035ebf3079e6.pdfIn PDF document text
    • https://cdn.sqhk.co/dasofuduveje/ieyuFie/blade_runner_2049_netflix_australia.pdfIn PDF document text
    • https://sagajogesef.weebly.com/uploads/1/3/5/3/135398815/3292561.pdfIn PDF document text
    • https://cdn.sqhk.co/gujipiror/ePhazx2/piwageni.pdfIn PDF document text
    • https://nitomono.weebly.com/uploads/1/3/1/4/131454496/3798244.pdfIn PDF document text
    • https://cdn.sqhk.co/zezetemirag/jiMGDhe/fruit_salad_chopping_board.pdfIn PDF document text
    • http://kojijeku.mygamesonline.org/80627452297.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485016/normal_5fd2aab39403c.pdfIn PDF document text
    • https://dexutafabo.weebly.com/uploads/1/3/1/4/131453723/latujidewozejoruwe.pdfIn PDF document text
    • http://flash-sar.online/marevajozogunidusuxebsfozf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488556/normal_605cb18aaffe6.pdfIn PDF document text
    • https://jujipepovoduvu.weebly.com/uploads/1/3/4/0/134017188/sopatida.pdfIn PDF document text
    • https://zixavuxo.weebly.com/uploads/1/3/1/3/131398386/mefokorokod.pdfIn PDF document text
    • https://winofugunolef.weebly.com/uploads/1/3/4/8/134846497/b3d7dd35.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001cfff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CFFF 5568 bytes
SHA-256: 71178f230d1c00c316a99361df878617175ab3b91587ee4c51d9d712acac2501
font_01_sfnt_off0001e2cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E2CD 11972 bytes
SHA-256: 2af6b4c4d1fa1221c4e5706d996b605c451606ee05d11bb606c55458ec5e6c22

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