Malicious PDF — malware analysis report

Static analysis result for SHA-256 472966d92728cb56…

MALICIOUS

PDF

96.2 KB Created: 2021-05-14 10:43:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 490de6016428ae9c760380ed9c4d0960 SHA-1: 91a7eab9b86ee4f279ad8783caa9cb6a28ccb39f SHA-256: 472966d92728cb56c93f5034b725319771a0e81a43ab79b537af16bdb791182c
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or spamming operation. The document body, though heavily obfuscated, appears to be a lure related to 'writing rap lyrics', which is likely a pretext to drive traffic to malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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.
  • 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://pelibifir.ru/strik?utm_term=how+to+write+rap+lyrics+like+a+genius PDF link annotation
    • https://xitolomeka.weebly.com/uploads/1/3/4/0/134012462/5177750.pdfIn PDF document text
    • https://molemopiwe.weebly.com/uploads/1/3/1/8/131856052/kirusokez-tufinavoni-bupogesiw.pdfIn PDF document text
    • https://ligelonajoka.weebly.com/uploads/1/3/1/4/131407163/9923062.pdfIn PDF document text
    • https://cdn.sqhk.co/fagaxirupunu/eigbrgi/organizational_communication_strategy_template.pdfIn PDF document text
    • https://cdn.sqhk.co/jezumasulej/ghjitjh/wendgames_world_boxing_challenge.pdfIn PDF document text
    • https://fusarutuzazeni.weebly.com/uploads/1/3/5/3/135346017/7880609.pdfIn PDF document text
    • https://cdn.sqhk.co/xitilesuxiw/agcNrif/chickens_coming_home_to_roost_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/geruvijiwiw/BMDP9gd/naughty_boy_feat_beyonce_runnin_lyrics.pdfIn PDF document text
    • https://todijaxazifaro.weebly.com/uploads/1/3/4/3/134342800/3157077.pdfIn PDF document text
    • https://zalozudipob.weebly.com/uploads/1/3/4/6/134673455/254133.pdfIn PDF document text
    • https://rowevopa.weebly.com/uploads/1/3/1/8/131872281/jamodinotukibatubip.pdfIn PDF document text
    • https://cdn.sqhk.co/tokarikadez/jdcIzks/alchemy_definition_simple.pdfIn PDF document text
    • https://cdn.sqhk.co/govazofaj/ih7hghd/460569160.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/dicjgTy/domino_s_hand_tossed_pizza_vs_brooklyn_style.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://b860438a-ced3-4995-86f2-ad9a24e3f15c.filesusr.com/ugd/938eb2_248ba656bf744fddbd5354730d3859b0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/35408506796.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/stock_market_holidays_2021_zerodha.pdfIn PDF document text
    • https://43fe4710-460a-4ad3-90dc-2dd795c51528.filesusr.com/ugd/a32c20_56e74ba81f334785b45aef71bcd6a1b2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/widofafane/how_to_program_wayne_dalton_quantum_garage_door_opener.pdfIn PDF document text
    • https://d6236f05-450e-4b96-9875-1783d83c708b.filesusr.com/ugd/912de2_48d7a09fe0e241ce9ee2a7aaf5c9b78e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bifamomove/dying_to_be_me_read_online.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012d91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D91 5200 bytes
SHA-256: c407c549f3cdcd2c22dc6048ec6ce629b8d1a1a0d619bd98d5ca3f24ad421ced
font_01_sfnt_off00013f61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F61 11208 bytes
SHA-256: 1cf3f3dd41881f219bf32a5d7e8036859e909ad74f75713651d5993b73d25cec
font_02_sfnt_off00016541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16541 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c