Malicious PDF — malware analysis report

Static analysis result for SHA-256 199a7521ab847af8…

MALICIOUS

PDF

72.5 KB Created: 2021-03-23 18:15:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a3065d3ec8eb824b7d6ccdae78c7b00 SHA-1: efa827cc5d0977a0b7d3464bae523fd4337da99d SHA-256: 199a7521ab847af86ca95044cfb2d2a7d6951655d6f00ac4717d9b5c346fb9c7
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly and other hosting services, indicative of a link farm or SEO manipulation tactic. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/wix?keyword=algebra+tiles+worksheets+multiplying+polynomials
    • https://towipikegogu.weebly.com/uploads/1/3/4/6/134690187/rebitapak.pdf
    • https://tofesozexeraj.weebly.com/uploads/1/3/4/6/134610570/4988050.pdf
    • http://kubisobej.22web.org/what_is_the_best_way_to_winterize_a_camper.pdf
    • https://jipalemidezuf.weebly.com/uploads/1/3/2/6/132681368/virizalatovikan.pdf
    • https://vojesegavosoza.weebly.com/uploads/1/3/0/8/130813146/058c4ee2d.pdf
    • https://cdn.sqhk.co/vixukose/WgdhfAc/democracy_jeans_ab_technology_size_6.pdf
    • https://cdn.sqhk.co/setuboluraje/wMGgfii/pokemon_wallpaper_pc.pdf
    • https://cdn.sqhk.co/rujiwujik/f6HgfYR/launcher_for_android_tv_box_apk.pdf
    • https://cdn.sqhk.co/vunelebu/bohggfe/sujet.pdf
    • https://cdn.sqhk.co/sotatixorawi/egcjfqt/76580930108.pdf
    • https://migobajiker.weebly.com/uploads/1/3/5/3/135390735/zofujopokafizun.pdf
    • https://cdn.sqhk.co/nilofixogezu/3hcdRCs/98724807929.pdf
    • https://cdn.sqhk.co/naxaroja/hgifhd0/rizirez.pdf
    • https://muvesajaduxu.weebly.com/uploads/1/3/4/0/134012660/085d5.pdf
    • https://mupexopuwes.weebly.com/uploads/1/3/4/7/134722910/5715438.pdf
    • https://cdn.sqhk.co/xenudipu/aNhcQji/56454591387.pdf
    • https://cdn.sqhk.co/jigavozef/mhcSrij/tumblr_pages_on_mobile.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2e62aae0-81d5-4675-be4e-8c52bbb96abd/ccna_security_salary_in_south_africa.pdf
    • https://uploads.strikinglycdn.com/files/fbdbfe0d-da2d-440c-a983-ca96188e7b0b/96350475680.pdf
    • https://uploads.strikinglycdn.com/files/67dbbb46-5c8d-46f4-a4e3-9ad31e99f2c1/75235088004.pdf
    • https://uploads.strikinglycdn.com/files/8db29c45-970f-4900-a1b8-be59fe1cacb4/best_how_to_sew_books_for_beginners.pdf
    • http://jiwuwusa.epizy.com/alerion_28_tuning_guide.pdf
    • http://mujunuge.rf.gd/kalimba_tuner_android.pdf
    • http://linopiziv.epizy.com/how_to_save_google_maps_directions_as.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_off0000dcf7.bin
b68fed5bcb1e15af629a9d29fb5f8fba934493788822a7dd9f74f28983fcba31		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF7 5620 bytes
font_01_sfnt_off0000f008.bin
bb9a509b80da93d46f81729e007aa44ba6a11b78e2729fd38b9a1e74745f1c8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF008 10572 bytes

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