Malicious PDF — malware analysis report

Static analysis result for SHA-256 68cb8d4ac040d1d1…

MALICIOUS

PDF

82.5 KB Created: 2021-04-05 08:48:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: d4ee46288328543ab52f0e34cdf5d48b SHA-1: 58315d2cb93debd3b4eb4271671efe7818e2d032 SHA-256: 68cb8d4ac040d1d1bb2207c9d6941b9add90484a74e5e3c2922cea42dae7faa1
126 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is a link farm designed to redirect users to malicious sites, specifically one related to 'icloud apk android'. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs point to disposable domains, a common tactic for phishing and malware distribution.

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://baarspo.ru/wix?keyword=icloud+apk+android PDF link annotation
    • http://teasmall.space/70153615857sph4x.pdfIn PDF document text
    • http://vash-komfort5.ru/digital_marketing_course_institute_in_pune01w8e.pdfIn PDF document text
    • http://lagegisujego.iblogger.org/arduino_nano_3._0_schematic.pdfIn PDF document text
    • http://formblckr1.xyz/youtube_how_to_thread_a_vintage_singer_sewing_machine3z4ag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407299/normal_60306e9f746b7.pdfIn PDF document text
    • http://meetcabinets.xyz/modern_english_short_stories_onlineqrn91.pdfIn PDF document text
    • https://cdn.sqhk.co/verikiweneza/gcjcUmP/read_between_the_lines_book_summary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413845/normal_60665b96d521e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381291/normal_5fcd26a6b29d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368760/normal_6005783fc7e0e.pdfIn PDF document text
    • https://cdn.sqhk.co/dusaradezat/nhbvUhh/drive_in_theater_los_angeles_showtimes.pdfIn PDF document text
    • https://cdn.sqhk.co/bisuligiga/WCcijie/airport_ding_dong_sound_effect_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sijeregezokim.rf.gd/mayans_mc_episode_guide_wikipedia.pdfIn PDF document text
    • http://pivunovukemo.epizy.com/6247526014.pdfIn PDF document text
    • https://3ae4d138-4ba3-4962-98fb-1b98b40a6a82.filesusr.com/ugd/38062a_edca80369dcc4228b2ca52adf620569b.pdf?index=trueIn PDF document text
    • https://24d1f61b-f5c5-4d2f-8180-62589f44e8d8.filesusr.com/ugd/eed56f_9bad43aace924dd9b3b72e4827884d4f.pdf?index=trueIn PDF document text
    • http://gorosojipi.rf.gd/lerupadidosivati.pdfIn PDF document text
    • https://1c54689f-8f60-44d8-8d81-b144d6ea8ada.filesusr.com/ugd/787b0a_c6960c48cd8e4954bdd1a59755e25c60.pdf?index=trueIn PDF document text
    • http://wiwafejopof.epizy.com/gimoduralik.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF257 4888 bytes
SHA-256: da1c28d215c80c2bb1d87c177671d92c61cd32826206fc006f4ce411a5f1a779
font_01_sfnt_off0001030a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1030A 10616 bytes
SHA-256: a90df55adca996fa064576713db7db7111351f5ba59e9afcb2b45d0b599d79d6
font_02_sfnt_off000127a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127A9 16232 bytes
SHA-256: ee0a29113e05e18cc9dd0aa818c1a56c150b8781d6e006ea1e202f9d193b0bc7

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