Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5803e659df89009…

MALICIOUS

PDF

77.4 KB Created: 2021-04-29 01:42:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 26bf51683bb1223350f4565db575ebfa SHA-1: 0b13725bb4572c14dc2bd3df728ac4c6ee1e6446 SHA-256: b5803e659df89009d96296599e5c16e304f60062cd1e04497dca72ac58e4e1a1
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF document is classified as malicious, exhibiting characteristics of a callback phishing or tech-support scam. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content. The document body, though heavily obfuscated, contains text related to 'adt cellular failure', likely a lure to prompt the user to engage with a malicious entity via the embedded links or a phone number.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://xajibur.ru/strik?utm_term=how+to+fix+adt+cellular+failure PDF link annotation
    • http://nawavidosuk.medianewsonline.com/97846525130.pdfIn PDF document text
    • http://bixorusinalabi.22web.org/tissot_t-touch_expert_solar_jungfraubahn_review.pdfIn PDF document text
    • http://lessonsonline.site/ge_universal_remote_control_codes_for_westinghouse_tv17k1y.pdfIn PDF document text
    • http://gimatadokij.mygamesonline.org/heograpikal_na_varayti_ng_wika.pdfIn PDF document text
    • http://kernig.pro/why_premiere_pro_no_soundwzbmr.pdfIn PDF document text
    • http://gowanenutik.mypressonline.com/dakexonavetawoxebokorakoj.pdfIn PDF document text
    • http://blancer.xyz/54838485015l17yz.pdfIn PDF document text
    • http://likelid.xyz/the_best_satisfying_slime_videos1ges3.pdfIn PDF document text
    • http://mekujoviwe.mypressonline.com/zizinuwefetul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bazimiguzanuv.rf.gd/zikuniwugazu.pdfIn PDF document text
    • https://d497f082-4895-42de-a72c-038d9367c8a3.filesusr.com/ugd/8e727b_dfe3274d3ba34ef6869713167b1cbb64.pdf?index=trueIn PDF document text
    • http://palipesokugukux.epizy.com/87548299669.pdfIn PDF document text
    • https://7e574f8b-ef34-4833-8dee-b18f3ac9fc91.filesusr.com/ugd/af8ffd_4f20276dc0ce48faa56618f4d0943bf1.pdf?index=trueIn PDF document text
    • http://kowuvemanavo.rf.gd/20069893788.pdfIn PDF document text
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_b84a680596134d39a13223b8281e24fd.pdf?index=trueIn PDF document text
    • http://dazejifudora.onlinewebshop.net/seismic_isolation_systems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2999e193-004d-4db0-a6ac-40d8f64ec13b/fitokujufakosipuvasuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e743ca9-1ce8-4bdc-b8ad-0186a8217e74/how_to_invest_in_the_stock_market_for_dummies.pdfIn PDF document text
    • http://gukupexokopiwug.epizy.com/50626512770.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75c0c6dd-7104-4220-bb6a-f5f34ae981d1/how_to_clean_danby_air_conditioner_filter.pdfIn PDF document text
    • https://18cb0a1d-3822-48a5-9ca0-56465202bc9b.filesusr.com/ugd/96564c_b98c4a3dbc184bd3b9ef097749aafc18.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b92dc2ba-6a4e-4954-8473-d7dd8898b5e7/samsung_scx_3200_toner_chip_reset_software_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19bb2922-ae1d-496b-992b-5ac14ba9042a/how_to_put_casio_fx-991ex_calculator_in_radian_mode.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f27d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27D 4960 bytes
SHA-256: d33a6dbc8ba55672ee8d4870cab95002c9f5cee1748eb5aa46f8f4e16cc18072
font_01_sfnt_off0001037f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037F 10700 bytes
SHA-256: e2408da3952e83c5cc25d0fd7d4a96ffeaa019b020f025dad8da053c68fa0f32