Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1724eb065bfba6d…

MALICIOUS

PDF

73.3 KB Created: 2021-03-18 07:40:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc4e5b1c1fa60272f2930d9b9bd3dce2 SHA-1: 93efeb5ccf01b20f8bf8b624741c31b8f71ab1ba SHA-256: c1724eb065bfba6d168821941a42ad2f20dcb85ee0cbbfebbf97df467a5ca1aa
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, contains text related to 'a l u ka full form computer' and references wkhtmltopdf, suggesting a lure to a website disguised as a search result. The presence of numerous external URIs and link farm heuristics further supports a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/123?utm_term=a+l+u+ka+full+form+computer
    • http://kafofal.mygamesonline.org/68970416992.pdf
    • http://lamaded.mywebcommunity.org/jipoxiga.pdf
    • https://jubozofarubowi.weebly.com/uploads/1/3/4/0/134095851/vuvinetebukugivaliz.pdf
    • https://nivojekegup.weebly.com/uploads/1/3/5/3/135322075/1760250.pdf
    • http://jofufunobek.sportsontheweb.net/zunivirupigunakeji.pdf
    • http://bukuminuwakub.mypressonline.com/fixed_assets_examples.pdf
    • https://vabiwedewu.weebly.com/uploads/1/3/0/8/130813601/dulonezanu.pdf
    • http://wativeb.mypressonline.com/10308936281.pdf
    • https://cdn.sqhk.co/zanudiwageg/bqoZhJW/43981748256.pdf
    • http://xomofaki.getenjoyment.net/44863406035.pdf
    • https://wasitenatibasi.weebly.com/uploads/1/3/4/8/134890771/salulosikazinuv-wuwifomomak.pdf
    • http://libidisebosuv.22web.org/71749925802.pdf
    • https://bididanigatozum.weebly.com/uploads/1/3/4/3/134314142/46155404687d733.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/budovewesekaz/garden_flowers_images_hd_free.pdf
    • https://s3.amazonaws.com/divexikav/what_does_dead_stars_mean.pdf
    • https://s3.amazonaws.com/wupiwupiwot/xusepu.pdf
    • http://lomigibowexalu.epizy.com/where_did_the_united_states_invest_the_most_money_in_latin_america.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_off0000e2c2.bin
48b1c3d093a48068a5bf9d27bdc3bcd5ba37338cb29f270cc5c4e75d8fabe2e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C2 5036 bytes
font_01_sfnt_off0000f3d4.bin
23b0e5f93f09696cd6485d36797b4033007e7c8d5825cc0302b1972b20006c05		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D4 10736 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.