PDF malware analysis — malicious · 6e8ba691f26c2f1d

MALICIOUS

PDF

83.0 KB Created: 2021-03-28 22:57:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13

MD5: fb90dcf22a987393db7a4a60dc110882 SHA-1: 2f548405ab29ada9c66f8c0b3b0cf655b4c09530 SHA-256: 6e8ba691f26c2f1db61d0f694df8c21456f9fdd4625fb0485ed921415caf0ab5

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM'. The ClamAV detection and ML classifier strongly indicate maliciousness, classifying it as 'Pdf.Phishing.Trojan'. The embedded URLs suggest a phishing or SEO manipulation scheme, aiming to redirect users to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9950

Heuristics 5

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 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.
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/123?utm_term=anomeric+carbon+formation PDF link annotation
- http://ruwegekugite.22web.org/79487125582.pdfIn PDF document text
- https://cdn.sqhk.co/zenekukera/jyhcggX/translate_from_japanese_to_english_electronic_voice.pdfIn PDF document text
- https://cdn.sqhk.co/lisutovudaf/thdhizB/best_praise_and_worship_songs_of_hillsong_2019.pdfIn PDF document text
- https://cdn.sqhk.co/bedazume/ohjWhbr/hello_dolly_movie_poster.pdfIn PDF document text
- https://cdn.sqhk.co/dukoredod/pjiwqjh/download_anger_of_stick_3_apkpure.pdfIn PDF document text
- https://cdn.sqhk.co/monazaxumol/8Qojixx/california_unlimited_speed_limit_towing_trailer.pdfIn PDF document text
- https://rigefenasoje.weebly.com/uploads/1/3/0/7/130776330/ce57d49aef62232.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4476930/normal_5ff22dbabfee9.pdfIn PDF document text
- https://woxazalaxit.weebly.com/uploads/1/3/4/2/134235403/6102888.pdfIn PDF document text
- https://satisetuxa.weebly.com/uploads/1/3/0/8/130813646/21f19f1efd3f.pdfIn PDF document text
- https://torevoxun.weebly.com/uploads/1/3/2/7/132712334/fuxebapezegog_rosifitazesepag_gimagume.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4491157/normal_5ff22bd353a16.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4473640/normal_60462a37862d2.pdfIn PDF document text
- https://meronikam.weebly.com/uploads/1/3/4/7/134705372/8775874.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4469827/normal_605c3d9733cdd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4497071/normal_5fd1316722998.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/tolivajupeku/30630079866.pdfIn PDF document text
- https://s3.amazonaws.com/lebaxa/logic_grid_puzzles_with_answers.pdfIn PDF document text
- https://s3.amazonaws.com/solonebosop/how_to_reset_a_sanyo_tv_no_remote.pdfIn PDF document text
- https://s3.amazonaws.com/wemofodi/what_are_technical_and_tactical_skills.pdfIn PDF document text
- https://s3.amazonaws.com/wuzalugiseto/zavuligopubiker.pdfIn PDF document text
- https://s3.amazonaws.com/bededuxotulapil/genie_pro_max_keypad_reset.pdfIn PDF document text
- http://sabozovitebem.rf.gd/wiboruruwurubuvubipu.pdfIn PDF document text
- http://xamudakosenezi.rf.gd/guess_bts_song_emoji_answers.pdfIn PDF document text
- https://s3.amazonaws.com/fulazelof/79898442256.pdfIn PDF document text
- https://s3.amazonaws.com/zonivezada/69102074463.pdfIn PDF document text
- https://s3.amazonaws.com/kozewuposoridil/ironman_70._3_chattanooga_race_report.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f248.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF248	4948 bytes
SHA-256: `8c882e38e635155b660734fa34fb0e73c1ed54d3f2fc927c41c8c9915f170fca`
`font_01_sfnt_off00010305.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10305	11304 bytes
SHA-256: `7afc1bef63844f01116f7bb2e988cc68d977eef14a4f838eb16e00df65b62fb9`
`font_02_sfnt_off00012964.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12964	16060 bytes
SHA-256: `4ef9506ee11a349461550e6b437e3786686b598308a87786035880d16624999d`

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